Yeah, I don’t really have a perfect system, but here’s what I do. For opening, I usually just pull the cover off (not fun), clean it up a bit, and then start reconnecting stuff — pump, filter, hoses. I let it run for a while to clear out anything that might be sitting there, then I check the water. If it looks gross, I’ll shock it right away. Then I wait a day, test again, and adjust the chlorine, pH, etc. I just go by what the test says, nothing fancy.
Closing’s kinda the same deal in reverse. Clean the pool really well, vacuum everything, balance the water best I can, and drop the water level a bit. I use a cheap winter kit and blow out the lines with a shop vac (probably not the best method, but it works for me). Cover goes on, and that’s about it.
Main thing I learned is don’t rush it. Skipping stuff always makes more work later.