The best advice I can give for cutting on the scroll saw is crank up the tension on the blade.
You can pluck the blade and listen for a high note like they say in the books, but I crank it up and watch my practice cuts. If the blade deflects much at all, it needs more tension. If the blade brakes, too much.
Let the saw cut, don't force it or the edges will not be square.
Try a couple of different types of blades, reverse, skip tooth, crown, and see what works.
If you struggle at first, just play around with #5 reverse and get a feel for the saw, then drop down to a #3 if you are needing a finer blade.
Good light on the table, a small fan to blow the dust away, and a magnifying glass if needed makes a more comfortable work environment.
The #2 mistake (after low blade tension) is sticking with a blade too long. Trying to sneak 5 extra minutes out of a blade that is getting dull can ruin a project. If you find yourself fighting the saw, try a fresh blade.
Take breaks when you get frustrated, and remember it's supposed to be fun.
Can't wait to see some finished projects posted