First thing to do: Ask your local skateshop!

Exploring the major brands video pages is also fun:
→ CONFERENCE on Vimeo
→ RAT TAIL on Youtube
→ RAZORS on Youtube
→ REMZ on Youtube
→ THEMGOODS on Vimeo

Youtube and Vimeo are your friends, you can search for your favorite Pros such as Chris Haffey, Eric Bailey, Brian Aragon, Billy ONeil, Brian Shima, Franky Morales, etc.. or type the words "rollerblading, "rolling", or "aggressive inline".

By competing in any WRS sanctioned event worldwide. Check the calendar!

The World Ranking and WRS contests are opened to any rider. You get points and enter the world ranking by placing top10 at any WRS event (1-5stars), good luck!

Visiting local skateparks and meeting with other Bladers in your area is a fun thing to do!

While "fitness" rollerblading might be fairly easy to learn, taking it up a few many notches to "freestyle rolling" will require patience and perseverance.. Remember that the wheels are attached to your feet and that you can not catch yourself as easily as on a skateboard for example.
In the end, though, the outcome will be rewarding as you will be able to go fast and big!

Most big sport stores carry products suitable to get you started, for fairly cheap, but very soon you'll become more aggressive with your skating and those will fall apart (meaning your skills are improving!)
Things to look out for when buying your first skates:
- sturdy construction ("designed for freestyle/aggressive")
- padded liner offering little or no pressure points on the foot
- solid frames w/ urethane wheels
- "soul" space to do tricks.

If you plan on doing this somewhat seriously, getting some good quality skates right away will end up saving you money in the long run. Ask your local skateshop for advice, they can order anything you want for you.

You can also ask around in web forums or contact the skate brands for more specific info and/or shop locations.
→ nimhskate.com
→ razorskate.com
→ remedyz.com
→ teamtrs.com
→ theconference.org
→ valo-brand.com

Check out print magazines such as Be-Mag and One, visit news blogs such as rollernews.com, and surf web forums such as the be-mag message board.

All these websites link to more websites that will get you in the loop quickly.

Have fun!