Assuming you work from home the real answer is that you just get up every few minutes and move. It doesn’t matter what. Some squats, pullups, pushups. Even a few hundred steps works wonders.
The key is to make the barrier to entry as low as possible. Then you actually do it more often.
Besides that, find a sport you think would be fun. Just try a bunch of trial lessons or join some people you know.
Not sure how much power you need - but I just bought a used Microsoft surface 7 pro and installed Linux Mint on it. Was pretty damn easy actually. Runs great!