Dont be sorry! How else are you supposed to learn? Trial and error is part of it, but if you can ask question and minimize the whole error part of things, you're ahead of the game.
The first week I had my first H.magnifica, I must have freaked out convinced it was dying half a dozen times. It was acclimating to my lighting and kept deflating and gaping.
As it got acclimated, the times it deflated and gaped grew shorter in duration and less frequent.
When I got my second H.magnifica, things were worse...read the "Heteractis Magnifica: Tell me some success stories" thread here for full details...
The short version is the anemone came in looking like hell and wouldnt attach to the rock. It just kept drifting around, but it was still alive with no visible injuries.
After two weeks, I got very aggressive in taking care of it (and decided I had nothing to lose), and managed to nurse it back to health.
They can be very frustrating in the beginning. Once acclimated, they become very tolerant and stable.
Like I said, I think you've got the tough part out of the way already.