I think I've found my biggest difficulty with animation, and that is: planning. This is good, because now i can work on it, but it's always frustrating too because I know it's going to be difficult.
I did start making a silly animation, though! Working on paintings is easier and it's something I've been doing longer. Commissions should start as soon as I get my bank account to work.
On other news, I want to do a Sailor Moon icon battle and am looking for some people to join. If you want to take part, drop me a comment :)