I am not sure about drawing... I tried it before but gave up.
Most Helpful Guy
You could pick a string, go to animatedknots. com and learn to make knots. I think, for me, it was a natural evolution from chinese puzzles, which is another great hobby but costs more. If you are willing to spend a little, you can get some paracord and braid bracelets. You could start by watching a couple of videos from Tying it all together on youtube. Knitting could be something you would like and doesn't cost too much. Crosswords, memory games.
Most Helpful Girl
Have you thought about sketching? My friend routinely gets photos off the internet of paintings he likes and then tries to reproduce them. He also makes his own comic strips mimicing characters that he sees in movies for humour. If you have access to a computer you might also consider learning a new language. I use the interlinear bible to learn new languages because its free. I use one program which reads the bible to you in audio in a foreign language and I use an interlinear bible which writes the bible in another language and I match the writing with the audio to learn Hebrew. You could also use the interlinear Quran to learn Arabic. Maybe listen try to learn some foreign music or explore songs in foreign languages.