Like dalphlA said, you might want to play maps more in your range, as while aim / speed is a pretty big deal in osu, people tend to forget that this is a rhythm game, making accuracy very important as well. You'll find that later on, getting good accuracy actually makes the game much easier in terms of PP.
The aim aspect of this game also makes combo very important, combo is even more important than accuracy. You should be aiming for close to full combo, if not full combo itself. PP is also very dependent on combo.
Accuracy and combo aren't just for pp, maps that you can get ok accuracy (95%+) and close to full combo are in your comfortable skill range, being able to mash out a pass on songs that are way too hard generally doesn't take much skill (Somewhat portrayed by the nonexistent PP reward low combo plays give, even on very hard songs), it takes much more skill to play maps properly.
Tl;dr You should play easier maps that you can get good accuracy and combo on.