Hey there!
That’s a very long post you have there, I didn’t mind reading it, but I would keep it more to the point next time.
First of all, I think it’s really cool you started with concept art, you will be able to create beautiful things when you put some time into it.
I would advice you to look up Andrew Price (Blender Guru), because he started digital painting as a complete beginner and has some great articles and videos about it.
Another thing I would do is get some traditional drawing knowledge first, so you understand the fundamentels like shape and value.
I hope this helps!
