@KiabIce There are a lot of great suggestions here- I'm totally watching Marshall Vandruff's video (per @Lensing's suggestion) right now (and going to refresh myself on ALL the perspective tools).
Also, concerning your notion to delay your book- It's tough. I don't want to be the defender of mediocrity here, but I wouldn't stress yourself like crazy about all the various details in comic making if that stress stops you from jumping into your book with a sense of joy (well... don't MAJORLY stress yourself (since stress can be a good motivator too)). It's easy to get overwhelmed with every little detail of what goes into making a comic and that can be straight burn-out fuel.
I totally love (and respect) your drive to make things properly. I'm not saying you should lose that/not use the forums as a teaching tool (it's an AMAZING resource- you're totally doing it right).
What I'm saying is that I took an approach similar to @mallory- when you feel ready to start- get started and use your comic as a means to help you learn and grow as you go (by all means, practice in advance and get an understanding of the basics, but you don't need to get caught up on every detail now). Whether it's Malcolm Gladwell's principle of doing something for 10,000 hours in order to become a master- or my badly paraphrasing of Spike Trotman (who was paraphrasing another comic artist): every comic artist has 1000 bad panels in them. Your growth is unavoidable if you do the work. Do what works for you and do it for the love. Someone WILL love your early stuff, but as the years go by, you know where it'll stink. It's unavoidable.
No matter where you start, it's going to be a journey. Your earlier work will be eclipsed by your later work. Guaranteed. I can see that you're putting the time in- so I'm guaranteeing that sh*t.
On the downside of this method- yes, this is also a recipe for potentially shunning your past work (and hooooooooo boy, do I feel that at times). But I am far happier that I picked up some readers at my artistic worst (who continue to join me) than had I waited years to get it right (because when am I ever going to get it right?!). If you have a spark, people will forgive some artistic flaws (some won't, though, and that's cool too. 'Cause you're you and screw the rest (I say that, yet I also bemoaned loudly, just last night, that I wish more people "loooooooooooooved me!") but hey- what's a journey without a step back every now and then?).
Also, if your first story is a long one, you can always reinvent yourself/the work when you're ready to. Comics is one of those glorious mediums where I can pick up a Spider-Man comic decades after his creation and STILL know enough to keep me interested without the baggage of needing to know all the continuity. You can ALWAYS find a way to reinvent your work later if you need to if you figure out a way in the storytelling (and encourage new readers to read the old stuff if they want to learn more about your characters).
No matter what- you're doing awesome work. Keep it up and I love seeing your progress!