It takes time trust me, when I first started I picked easy jobs to start with and were still tough, can't count the blades I broke either too loose tension, too tight, made a turn and break one, or not knowing when it was dull and overheat it breaking it. You will get the hang of it. Go to mikesworkshop.com check out his charts and list for the FD blades, I use a reverse 1 for normal jobs, if I go thicker I use and like the ultra reverse has teeth both up and down and use a 1 as well and it cuts good. I also keep watch on the back side on my reverse blades if fuzzies start appearing the blade is getting dull and change it out, blades are cheap easy to get so as soon as it gets dull or close to it or not cutting like I want I pitched it, get a new one makes it easier to cut with a good sharp blade.
Your choice of blade will be different than mine and others find a blade or blades that you like and stick with them. Don't use those from lowes or sears they do work but are high, cheap they will get you by in a pinch might be good to practice with but be better to get some FD(flying dutchman) blades.