Lots of good advice already given. If you're landing well without power,then you should be very close to being able to land with power,just takes a slightly different technique perhaps. Something that helped me when I was learning to land my trainer,is when I started trying to hold the plane just inches off the runway for as long as possible by very gradually feeding in some up elevator as the plane slows down(not so much that it climbs or stalls). In other words,try to line it up a ways away,then just before touchdown,try to keep it from touching down for awhile to bleed off speed and slow the descent. If done gradually enough,you can get the plane into a nose high attitude and use a little throttle to keep the plane from dropping too fast. Watch those wheels and try to set them down ever so gently on the main two wheels(I'm assuming it's a trike gear). You want to avoid letting the nose wheel touch first. If it bounces on touchdown,or you just don't feel comfortable with the way it's coming in,give it some throttle,let off the elevator a little,and go around for another try.

Now that said,my main problem early on was coming in too hot and bouncing. Maybe you're having a different problem,like lining up with the runway? If that's the case,practice low fly-by's over the runway til you improve at lining it up. When low to the ground,try to steer mostly with the rudder and keep the wings level with ailerons.

Good luck with it. Hopefully it will start to click soon,and you'll find like I have that landing is always a challenge,but it becomes a fun challenge rather than a scary one.