JY, I know what it's like just starting out, we've all been there, and done that. I would like for you to slow down a bit, otherwise, you're just going to be wasting money. You're asking all kinds of questions, which is a good thing as long as you pay attention to the answers. You already jumped the gun and bought spiral blades, not knowing if they are what you need. That's no biggie as you'll probably want to learn how to use them, along with flat blades. But, what type and size of blades did you purchase? Before you start cutting much, you should put on lots of time practicing. Get a piece of plywood and cut it to pieces, practice making turns, angle cuts and straight lines, even practice making sharp zig-zags. Learn all about the blades and how they cut, then you'll be farther ahead in the game. Personally, I don't use spiral blades, I can't control them. I use flat blades, I find them so much easier to use than the spiral blades. Don't be expecting to be a proficient cutter right away, you need to practice to get good. Practice practice practice, then you'll be happy with the outcome. If you want to learn what blade you should use for whatever, check out the Flying Dutchman's site. Mike no longer sells blades, but he still has info posted on what blade to use for whatever you want to cut.
Len