Poker types to choose

Eventually it turned out that there are different types of Poker. My Poker adventure seems to become more difficult than I expected it to be. I live in Europe where Poker is not exactly popular; I have been to quite a few casinos and arcade halls in Central and Western Europe and never saw a big Poker game, only Blackjack for insane amounts of money. So what I'm saying is that I'm absolutely clueless when it comes to Poker.

Anyway, the only Poker variant I watched and also played as a kid is "Five-card draw poker" (or "Draw 5 Poker"). I don't want to go into details here because I don't even remember all of the rules but basically you can return unwanted cards in exchange of new cards from the dealer. I guess this is referred to as the "Draw". However, my little web research showed that this type of Poker aint even available in most of the online Poker rooms.

From a "money point of view" I want to choose the Poker type with the most players to get ahold of the "stupid mass"... My decision is final:
The game of choice is Texas Hold'Em Poker.

Looks like I'll spend some time reading :)