I applaud your decision to make your own picks mate, I always love seeing the stuff different people make.

In saying that, you can get a set of picks for $5 (and that includes shipping, so it really is $5 all in) off dealextreme/bestofferbuy. I have a set and whereas the tension wrench leaves a lot to be desired the hooks themselves are actually surprisingly good. Just food for thought.
As for your picks so far... they look a little rough, but that's an easy fix. Just sand like crazy, shouldn't take long as the metal is very soft. In saying that, I've made wrenches from coathanger before and they hold up just fine. Dunno about picks to be honest, they'll probably do the job, but just be very careful not to be too rough with them cos the thinner the metal gets the more malleable it'll become. I wouldn't be surprised if they start to bend fairly quickly but hopefully they don't!
So yeah, all going well they'll work just fine, but I dunno about the feedback they'll provide as they are right now. As well as sanding them thinner and smoother you should also give them more defined tips to provide a bit more feel for individual pins. Not so much the one on the right obviously, cos that one looks more like a rake you're going for, but the other two. Doesn't have to be perfect, but at the moment they're a bit on the big/rough side so you might have trouble determining when you're on the tip of a pin. Well, I say that mainly for your hook on the left, the middle one is actually ok. If you ask me, the one on the left will provide very dull feedback and probably isn't the best kind of pick to start your learning curve with. It'll be ok for rocking/jiggling and rough manipulation though. The middle one will be better for feeling out individual pins but I'd still sand it and give it a teensy bit more definition.
Keep it up mate, and keep us updated!