My goal was never to draw photo-realistic art, in fact I just wanted to create works that just looked nice to look at, so when I got to the stage where I was able to draw good-looking pieces, I then wondered how far could I push myself, so I started to study how other artists drew their works, I learnt quite a bit from them, once I reached that level of realism, I fell back because I believed I had reached my goal, I no longer wanted to follow that route, so now I just draw whatever I can in any style/detail I desire.
As for where to start.. just draw anything, get to know your environment, it's really important to draw from objects around y