To have the impact on other people that you saw Blaine have, and felt Blaine have, takes a lot more than the secrets to tricks. Yes, you need the secrets, and you'll find that you can come by them more easily than you expect.
What is far more important is to show those secrets respect by practicing diligently and thoroughly. You've wandered onto a forum that happens to include, and be read by, some of the very finest magicians in the entire world...as well as many of us who are not at the level but do know quite a bit and can be very helpful. The amount of knowledge on this board is unbelievable.
To really benefit from it, though, I would suggest not just coming in and asking for secrets. Take the suggestions you've been given seriously: Magic for Dummies, The Amateur Magician's Handbook, Mark Wilson's Complete Course in Magic, and Harry Lorayne's The Magic Book are excellent places to start.
If you take those books seriously and work at what you learn (and have fun with it!); then maybe magic is worth continuing to pursue. At which point I would move on to the Tarbell Course in Magic and subscribe to Genii Magazine.
Magic is not for everyone, and there is nothing wrong with that!
Being able to do what you saw Blaine do takes work, but -- if it is for you -- it is enjoyable work.
Truly astonishing, high level magic is not -- however -- something that you can casually dip into.
Coming onto this forum and asking to learn to float is a bit like coming to a music teacher, after having heard a world-class performance of Mozart, and wanting the secret to being able to immediately perform the same piece at the same level.
Yes, there is a secret to the trick -- but knowing the secret and being able to do the trick convincingly are two VERY different things.
A lot of people saw Blaine on TV and wanted the secret to that trick, they were -- unfortunately for them -- able to find it before they had any kind of serious foundation in magic. They ended up looking very stupid in front of their friends when they tried it and it looked awful.
The levitation David did takes experience and a solid foundation in magic to be successfully attempted live.
So, if you're looking to be able to do this overnight... reality is that it is not going to happen
If that means this art isn't for you, that's fine and I think you will have saved some of your time by realizing that now.
If you think this might be an interest you could go deeper in, then welcome to the club!
Pick up one of the books mentioned, find a cozy chair and a deck of cards, and enjoy!
Best of Luck,