I would not start at super comp dragsters.
They are not easy by any matter of means.
Think about starting off in a door car and moving up as you gain valuable experience.
Super comp dragsters take skill and money to run and unless your rich you need to get sponsored. Not to many will sponsor an unknown.
Get your name out there by racing for a bit, win some races and then look at whether you want to still race a dragster.
It all looks so easy, but when you start skating accross the track or your car wants to unass itself you will know that it is far from a walk in the park.
No one wants to discourage you though, it is cool your following a dream, just make sure you follow it as a dream and not end up a nightmare.