Welcome to FT!

You may want to check out the three major alliance

www.staralliance.com
www.oneworld.com
www.skyteam.com

and choose the one which you may be able to use the most.
Pick one airline which you think you'll fly the most as your
primary FF program. Try to stick to an
alliance to get maximum benefits.

If you need to use more than one alliance, pick a second airline
program from another alliance.