It is quite easy.
www.elance.com/q/find-work/online-work-overview/
Just go there. Sign up. Apply to get verified, which is done via Skype.
Setup your profile, bio, work history and most importantly your portfolio.
Because you will be new on there, it will be more difficult to get jobs initially. you may land one for every 10 to 15 proposals in the beginning.
To start off with:
- Quote lower than you normally would
- Go more for fixed price work
- Build up from small jobs to larger ones
Once you got a few jobs completed and good ratings from employers, then you can start charging more and going for the bigger jobs.
Getting paid is super easy. Just apply for a payoneer mastercard and then all payouts from elance will get paid into there.
Read through the help section of the site for detailed advice on how best to setup your profile.
Also take the tests. The more tests you pass at a higher level, the easier it will be to land clients.
Hope that helps.