I want to be a mechanic (assasin) - how do I go about doing that?

Assasin...maybe you should work on your English first, it's kind of an important language.

Well, I doubt you'll actually want to go this route as it would be a very long process, but you could try joining the Army and working your way into Delta. There you would become the most efficient killing machine possible, and might even get to play assassin for Uncle Sam now and then. You would also have the opportunity to either hunt or maybe work directly with some foreigners in the business of contract killings, so you could start building your network of clients.

Once your contract with the Army is up, you use your refined skills and "street cred" along with the contacts you made along the way to start your career as a mechanic.

And if the assassin thing doesn't pan out you would have a guaranteed job as contractor mercenary, which would still allow you to shoot a lot of guns, maybe kill some people now and then, and get paid pretty well in the process.

You could follow in the footsteps of George Clooney. Put a horrendous-looking scope on your Mini-14 that you would never be able to sight through because it's ridiculously misaligned with the rifle stock.

http://www.filmofilia.com/wp-content/uploads/2010/04/George-Clooney-in-The-American.jpg

But nonetheless hump the Italian supermodel. Then go back to Hollywood and advocate for gun control. Sounds like a plan.