What should I do first?

I have limited time but several stupid things to work on. What should I take up first?

1. Improving kiancoin and finding new use cases. I have a few things to improve: I need to fix a bug with the top kiancoin holder list on kiancoin.com, and I have a few ideas I want to explore, particularly around quadratic voting and incentivizing Uniswap market participation.

2. My car's defroster does not work. I think I know how to fix it (there's a small motor that diverts the airflow from my face to the windshield). It'll be a fair bit of time to investigate what's wrong and take apart my car's dash to get at the problem.

3. Chair pocket. I have this poofy, red rocking chair that I use every day. I love it. I would like to sew a pocket on to the side, maybe using velcro so I can take it off and clean it easily. I'm considering this a big task because I have no idea how to sew but want it to look nice.

4. My job. Instead of doing the above, I could divert my free time into important backlog tasks at work, increasing my visibility within the organization and potentially resulting in salary increases and a promotion in the future.