Okay... short answer is yes. It is hard certainly, but this is going to sound weird.
Learn your foundation skills first then focus on true realism.
If you have a good foundation, realism comes more easily. The two go hand in hand, and trying to go about realism with out it? Oh man, that's like trying to build a full sized house with toothpicks.
I might be forgetting a few but the basic foundation skills are value, composition, light/color, form, and perspective.
Even the tip top artists still hone these basic skills. Which helps them immensely when they try to tackle realism.
This is a recent face study I did. Which I usually do when I come across a face that's really interesting.
Oh! Another bit of advice! With visual art, tutorials never really helped me. Books never really helped me. Watching those speed paint things... just made me feel awful. What did help me, was critiques. Not always of my own work, but dang do they make you see what you can do better and they just make you want to improve so bad. Like seriously, if you're too nervous to ask your favorite artist, there are truckloads of artist critiques on youtube!
Somehow when you see something you're doing wrong be corrected by a master, it just clicks! Like one time, I watched Anthony Jones (amazing creature artist) do a paint over for one of his students and he fixed something I never realized I was doing wrong. Like the fact that, eyes aren't pure white. Skin is never uniform pink (actually it's grey-yellow and soft red). Hair actually tends to clump together and shouldn't be drawn strand by stringy strand. All sorts of things!
I dunno everyone learns differently though! Best of luck! : >
Edit:
OH! Almost forgot! Image flip! Like.... DO IT! Seriously. You catch so many mistakes. Like, I had a wonky eye that I caught here. XD It helps out loads! ALSO! Don't worry if your image looks weird or bad in the beginning of working on a realistic piece. (They always do). OKAY I'LL STOP RAMBLING.