I started for real last year at 29.

simple advice that i took:
(1) try to keep your pedaling at 80-100rpm at all times. change gears to keep it at that speed.
(2) focus on keeping even, constant pressure on the pedals to develop a smooth, circular pedal stroke.
(3) ride a lot of miles.

for me, i got better quickly by trying to catch everyone in front of me and trying to stay away from everyone behind me.

if you're like me, you might find yourself craving a road bike very soon