If you are interested in learning a fighters techniques, the best thing to do is to get some fight footage and watch it over and over, in slow motion. Then take that to the gym and work with your trainer on specific techniques that you've seen on film.
One catch though - if I were you, I would focus on just learning all the fundamentals for the first year. you want to have a solid foundation before you get into specializing, and additionally, you may find during that year that there are particular combos/techniques that really work for you personally, so you don't want to forgo those things that naturally work for you solely to imitate someone else's style.
One thing Tyson did a lot that I like is the left jab to the body, then right to the face...try working that combo and you'll see you can generate a lot of power with that combo. Hitting to the body is helpful in MMA, b/c you want to be aware of levels (since a takedown is all about changing levels) and make your opponent aware that you are aware as well - eg. you don't want to go head hunting and get taken down.
Also, I think you can integrate some of Tysons head movement, etc. but not as excessively as he did since you do have to deal with clinch and knees.
Hope that helps.
