Hello, and welcome.
Learning by doing is often a good idea. We usually meet Thursdays nights at the Spielbar (usually starting sometime between 7:30 and 8) for “one-shot” games (basically one off adventures). I think this is a good way to learn, and as we tend to play whatever system the person running the game feels like (which could be something no-one else knows anyway) not knowing the rules is often not a hinderance. Plus, we are quite tolerant (I think ;)) and enjoy meeting new people interested in RPGs.
If you are interested in joining on a Thursday there is usually a thread started sometime around the start of the week (tonight’s thread for example: Thursday, August 24 @ Spielbar). It is useful if you a drop a message in those threads if you are likely to join as it gives a chance for people running the game to plan.