I never soak any seeds. I've heard of people soaking legumes but not squash. If you are a beginner my advice would be to ignore the soaking until you've got the hang of all the rest of the things you need to learn like watering, light etc. It always seems just one more thing to faff with and I don't think it gains anything more than a day or two.

I soak my peas and beans over night and then stick them in damp (not super wet) soil - I usually get excellent germination rates.

I rarely soak anything else - though I am trying it with cilantro and parsley this year.

Never heard of anyone doing a twice a day rinse - except for making "sprouts"