Why is everyone suggesting that this guy play with high AR and OD, hotsounds off, HR and NoFail? None of this is going to benefit a player of his level. -_- He's not a pro, guys. He's just working up to the level where he can regularly make jumps. Silmarilen and Lewa seem to be the two with the best advice from what I've seen. The only way to improve your aim is to keep playing maps that you are ok at, and then try to make every jump. Once you can FC the map, move on to more maps that you are ok with. If you start getting good accuracy, then those maps are getting too easy for you, and you might as well move up to harder maps. Eventually aim will stop being your problem, and you'll find that you have another thing to work on. Through that process you will become well rounded.
The only mod that I suggest experimenting with at your level, OP, is Hidden. If you find that you can over 98% and a Full Combo on a map, then try it with Hidden. That will help you get used to aiming predictively, for lack of a better term. You can try Hidden on any map, but the minimum I think you should be able to do is FC it before you go for the Hidden mod. We're trying to train good habits into your muscles, not survival habits, which are what you get from playing above your skill level. That's my term for muscle habits that just keep you alive, but don't help your combo or accuracy.
Good luck, OP.