There's some thing you need to know about riding track bikes that you must be accustom with before riding one.
The first and obvious one is you can't stop pedaling. It will make even short rides difficult because even at slow speeds you have to pedal.
If you try and coast on a fixie you'll suffer from what we call "kick","pedal kick", "Strike" or fu*k cool slang, if you stop pedaling the rear won't stop and the force of the rear wheels rotation will make itself know via one pedal continuing on it's upstroke. You will not catch it, you will be sprayed all over the road. I've seen seasoned riders brainfart and them and the bike have been launched into the air. I got kicked so hard 2 years ago me and the bike caught so much air I thought I was going to re-enact the Challenger disaster. I got a torsion related nut injury in that crash.
You'll need to learn how to pedal in circles pretty quickly - if you mash the pedals you're going to hurt your knees. One side is a down, the other is an up. Spinning is winning.
1. Don't ride brakeless, but learn to skid.
2. Do ride clipless
3. If you're going to ride brakeless, learn how to stop the bike with your one foot on the rear wheel or the front wheel. If you drop a chain you'll have no brakes.
4. Run short cranks. The last thing you want is a pedal strike mid corner at anything over 10 mile an hour.
5. Don't run anything above 77 gear inches. 77 is a big gear for city riding.
Tact was created by those lacking the mental dexterity for sarcasm. ~ Petrol_Spice