That's really nice of her
Yeah, assuming you're talking about making profit from the site. I on the other hand would honestly not ask to be paid for my art and the main reason for that is because I don't need the extra pocket of cash (disregarding the fact that I'm still practicing and honing my skills). Kind of irrelevant to talk about me as an artist when really there's more to having the funds to hire people.
As for potential legal problems could you give examples as to what may occur for it be considered as such? I'm just wondering for future reference since it sounds quite important...anything with the word legal sounds important, haha.
Wow, you're absolutely fantastic because I can't read a book about coding without having multiple breaks or I'll end up asleep (even if I'm really inspired/excited to learn, I honestly do love coding though). Self-taught to...I'm impressed. Thanks for the links, I'll probably buy a few if not all of them whenever I have the time to since I'll be a junior in highschool. Apparently it's considered one of the difficult years in highschool, but I don't know...
Just wondering is codeacademy good for learning php and javascript or would you recommend looking at other guides/tutorials/books as before mentioned. Basically which one would be better, or learning from both is good?
That's great, at least you got that out of the way. As for the art I think it looks good, but I'm going to presume that you'll be competing with other pet sites as well because there's always competition around.

When in doubt, wait it out. Basically wait until you're happy enough to move forward and decide on a concrete decision about this since it sounds like you've been stock piling
a lot of awesome art along the way.
It's OK though to start over even if it seems like it's a waste because sometimes you gotta do what you gotta do.

I agree that the art is definitely an important piece of a pet site since it's one of the main factors that garner/appeal players.
Just to clarify though that I absolutely do love your art of the Novu, NPC, etc. to be frank I would join in less than a heartbeat. <3 They're so adorable!