Magic Forums

I am just starting out with magick and as yet haven't cast a spell but have been preparing for doing so.

I have a couple of questions before i start out if anyone can help me please.
I have decided on the first spell i would like to do....it's to get a very negative person out of my life, IF i find it doesn't work (though i have a strong feeling it will) is it ok to cast the same spell, or similar, for the same results, and if so how long after the first attempt?
Another question is i hear that spells can come back to the caster 3 fold, is that only if you are doing a nasty spell like wanting someone injured ect?
These are just 2 questions i don't seem to be able to find an answer for.

Thank you :)