It will get better with practice. I started cutting about 2 months ago. My first project was... Ugly for the lack of better words. Now I can cut just about anything, and 10 times faster than when I first started. Like everyone here will tell you, make sure that your blades are correctly tightened as it will make your cuts more accurate. Also, once you learn that blades don't cut straight lines, it will really help. By that I mean, when they make blades, one side is sharper than the other which makes it hard to cut a straight line. You'll learn to hold your wood at an angle to compliment how the blades cut.
Oh, and start with soft wood like Pine. I learned on super hard, dense woods and was shocked how much easier it was to work with baltic birch ply, and pine. Night and day.