A couple of points re: starting your fixed gear riding: 1) mount good brakes you can reach and 2) for your first fix gear ride(s), put a piece of tape on your seatpost 1/4" above the top of the seattube. Drop the post to the tape. Don't raise it until you have done at least one "coast" where you tried to stop the pedals. This is the voice of experience talking, I did my first fix gear ride on my normal seat height. Forgot and tried to coast. Threw myself a couple of feet into the air, still strapped onto the bike but I did not land on it. The pain of landing on the road was FAR LESS than the pain my leg went through!

I love fix gear riding. I've been doing it for 40 years and don't plan to stop.

Ben