This guy's videos got me started on playing RPGs. At the time I was interested in Cthulhu but quickly switched to D&D.
On Roll20.net there are tons of games to join. Some are introductions to D&D. Playing online is the fastest way to get your feet wet.
Here's another:
StartPlaying.Games. They are paid games (mostly) but there are reviews of the DM so you can probably be assured of getting a good DM.
Many games stores have an Adventurers League that you can join for weekly one off games. I did that after playing some online games and before I knew it a group of us had formed a regular table. Here's a facebook page for an Adventurers League in Netherlands held at a game store:
Weekly Adventurers League hosted by the Games Guild. The quality of the DMing and players can vary quite a bit.