You should be good without stabilizer for atleast two heats as long as you do not overheat it. Mo is pretty on with the 1 minute and check, however, depending on the microwave, I can not do it in mine in one minute intervals. I might only need 30 seconds on the last heat, because a minute will scorch it. Like he said though, you will get the hang of it. The videos will help, but trial and error with your equipment will work best. Get the basic ideas from the videos and then play with it. You will get the hang of it.

The most important thing for you to know though is safety. The stuff will burn you badly, I am a witness. The slightest little mistake or wrong move can get you hurt. Read up on some of the safety tips first. Have lots of fun and be ready to spend more money on it.