Here is something to do when it’s raining. Learn how to track stand. You only need a little bit of room, and a track bike (or any fixed gear), to do it. I learned in a hallway.
I’m going to explain this the “left foot forward” way. It’s the way most people do it, but if this is absolutely not doing it for you switch all the rights to lefts and the lefts to rights and you should be good to go!
Stand over your bike. Waddle your bike backward so that your right peddle is at the 6 o’clock position, or so that your crank arms are perpendicular to the floor and your right peddle is lower. Put your hands on the handle bars like you would normally if you were going to ride your bike. Tuck your right foot in the toe strap of your right peddle (if you’re not comfy doing this you don’t have to) and keep your left foot on the ground. Rock your bike back or forth. Feel how your right foot is moving. Give your right foot a little weight and rock back and forth some more. Feel how when you rock forward the weight of your body on your right foot on the peddle is resisting the bike’s forward motion, wanting to bring your bike back.
Next step. This is it. In that same position, push your bike softly forward like you are going to ride, put your left foot on, and turn slightly to the left, resist the forward motion with your right foot pressing down, resist the backward motion with your left foot pressing down.
Learn to fall. Learn to bail.
Once you are comfortable standing up and doing a track stand, try putting both feet in your toe clips. Then try sitting down, then try only “pulling up” on your toe clips to steady your wobble.
After that the possibilities are endless. Check out how far Burd Phillips has taken the track stand.