I am  wanting to learn the first and formost and most basic trick for tricking is doing a backflip from heights... in a nutshell can someone tell me some good excerises that i should do to build up confidence... and any tips on how to break the fear of flipping over your center of gravity?
 2) I also need to know what should i know while performing this trick form.. etc.. ive watched youtube videos for the past few hours and i think i got it down but i would like to hear a few words from the community.

ok first off just because your in a gym with lots of padding etc does not mean you are invincible. very serious injuries have resulted from this mindset and some of the worst injuries i have seen/heard of have occurred in padded gyms. thats said it is much safer to practice in a gym with pads rather than over concrete. just dont get the im in a gym so i cant be hurt mindset.

next the best way to learn a backflip and build confidence is to get a good spotter. find someone who at least remotely knows what they're doing. go introduce yourself to the cheerleaders if you have to and ask them to spot you  . seriously nothing can replace the usefulness of a knowledgeable spotter. even after they stop physically spotting you they can watch you when you go on your own and give you more pointers.

Thank you... any comments on the technique? Going over in it in my head mentally repitions... would love to hear some advice from the community on this subject.

well we've all established that the gym is the best way to learn it.

what you need to learn first, is a normal standing backflip. get an instructor at the gym to help you properly and safely learn to do a standing backflip. the day you stick one and can consistently do one with out help, is the day you overcome your fear of doing backflips. so repitition and commitment.

second. a backflip on the ground is different from a height. i find it easier to keep my legs straighter while performing a backflip from a height because i can spot the ground easier than opposed to tucking hard in a standing backflip.

go try them out yourself. but be careful and be safe!

leon are you serious? Thats the best way to get somebody injured. Never watch a video and memorize it and then attempt the back flip thinking well since he can do that must give me invincibility to try it myself. You always want to think safety first, all of the bad injuries come from people not caring about the safety sometimes even their lives. I would highly recommend going to a gym and have another gymnast spot you.