Would you say the way how I draw a anime face has improved significantly?

[Silver7]

Here is my previous art

Here is my art trying to improve after the previous:

Here is my latest art, something I drew 15 minutes ago:

[jwabeasley]

It's an improvement! Remember to visualize it in 3D in your mind, rather than thinking in 2D symbols.

[Lensing]

You have improved but not significantly, the top and bottom one
look very similar, the bottom one looks less rushed. The one
in the middle looks best but it´s also looks like you still guess
where things go.

I say some similar to what @jwabeasley wrote.
The significant improvement will happen when you turn drawing
symbols into drawing shapes in perspective.

But...your drawings look fine. I was drawing with not 3d looking symbols
most of my life and that´s something which took me a very long time to understand.
If I would have been as good as you are now at your age I would be really good
now

[miuthecat]

May I see your anatomy models / drawing construction / rough drawings? If you didnt use any base on your drawing and you're a beginner I believe it's too soon for you to draw freehand.
When a beginner draws freehand some drawings may look ok, but in the long term you'll keep drawing like that and you'll never learn anything.

Rule of thumb: 99% of the work for a good drawing is done in the preparation and not in the drawing itself.

[DokiDokiTsuna]

I think you've definitely improved significantly; you seem to have a stronger understanding of facial structure and composition, not to mention more confident lines

If you want my advice to keep improving, I would say:

(1) Keep drawing faces, especially of characters you like!

(2) Practice the same faces from multiple angles. Rotating anime faces is primarily a matter of style; the way you draw them will depend a little less on realistic 3D interpretation and a little more on what the style you're using requires of you. Things like shaping noses and lips, or 'mirroring' bangs instead of picking the side of the head where they "belong"...very style-dependent. ^^ It never hurts to start learning what side of the fence you want to land on with those things.

(3) Keep an eye out for proportion rules! When you study existing characters you like: are their ears always a certain size? Are the eyes always a certain distance apart; are they closer to the top of the head or to the chin? How close is the nose to the eyes...?
Most artists have style-defining patterns that form the answers to those questions (and others like them); learning those patterns is the key to mastering a style, AND to creating a consistent one for yourself.

[wolflu66]

I think you've improved quite a bit. The character in the first one is rather flat, and lacks the "back of the head" - this is a problem many beginners encounter.
But it looks like you're gradually improving, which is very commendable.

[kyupol]

Improved a little in my opinion. But that's good. Better than not improving at all.

[Silver7]

This is the only full body drawing I have right now if thats what you meant by anatomy models, how ever my drawings are freehand

[miuthecat]

Before you can draw a style such as manga you must learn ro draw normal humans

Art is a very complicated thing, and we, humans hate complicated things, so, we invented this clever thing called basic models which pretty much allows artists to create the scene with little effort.

This is an example: a man spinning a chain, I used a very basic wire model with the correct human proportions (kind of, a bit rushed) and a photoshop brush. It took me 1 minute.
If I drew the final art without this, it would look very clueless and it would take much more time.

This is the type of art study I expect to see from a beginner.
Why dont you try to draw your freehand on top of that? I'm sure you'll be surprised.

[DokiDokiTsuna]

This is the type of art study I expect to see from a beginner.

Not to be a curmudgeon, but I don't think there's anything wrong with freehanding drawings as a beginner. I freehanded pretty much everything I drew for about 16 years; I didn't start using action lines or basic shapes regularly until very very late in my art journey. ^^;

I think I just happened to have an eye for memorizing poses and body language, so I didn't really need a 'guide' until I started to understand composition (and started wanting to invent my own poses and body language, or translate them from live-action media).

All that is to say, I don't think a beginner artist needs to worry about posing too much unless it's something they particularly struggle with...and @Silver7 doesn't seem like they're struggling in that area; in fact they seem like they have an impressively good handle on it. Their main problem, as I understand it, is consistency...i.e. showcasing a true understanding of the body rather than just putting up a good front every now and then. So anatomy would be good for them to study, yes, but not necessarily by breaking the body all the way down...they already have real skill with the stuff above the foundation; I think it would be a lot more efficient to start by using that to improve.

[kyupol]

Here's some anatomy practice drawings I did back in the day...

[Kelheor]

Before you can draw a style such as manga you must learn ro draw normal humans

No, one really "must" not. Anime characters are normal humans in a different style, one can learn both simultaneously.