You are too old to play casually. people who play at your age play competitively or have a group of people to play house rules with (such as cube draft).
For competitive play you can:
1. draft ($10-$15 every time you want to play, different deck each time, lasts 2-3 hours)
2. look up pro decks online, spend a lot of money buying the most popular, and play against a lot of people who also use the same 2-3 most popular decks.
Quote (LA-Leviathan @ Jun 1 2012 10:34pm)
was there ever a point where a rookie could just pick it up? What has really changed?
when everyone is in 7th grade the lack of money makes it much more casual and easy to pick up.