You should check the blade alignment and try to get it within +/- 0.003". There should be lots of videos or online instructions. (Howard Acheson's method
cheap and effective)
Waxing the front rail should make the movement smoother.
At the very least, take the blade off and give the teeth a good cleaning.....you can soak it some kerosene overnight if you've got some. If not, spray the teeth with a household degreaser like 409, Simple Green, etc., and hit it with a brass brush. Keeping blades clean is important, and will help your blades cut better and last longer.
You'll get the most out of your saw if you put a decent blade on it. A good thin kerf 40T general purpose or 50T combo blade will do a nice job on most tasks, and will be easy for your saw to spin. Some of the better inexpensive blades are the Freud Diablo D1040X or D1050, Ridgid Titanium R1050C (made by Freud), DeWalt Precision Trim DW7140PT, DW7150PT, or CMT ITK Plus P10050...all readily available, all < $40....some closer to $30. If you need to rip stock 2"+ you might want to pick up a 24T thin kerf ripping blade like the Diablo D1024.
Looks like a nice saw for the price.