Syag -“If you walk around in a mask you are doing very little unless you are also washing your hands well,…”
There’s Tzay Dinim. When you’re talking about getting yourself, then you should do all those things that you posted.
When you’re positive or pretty sure you have it, the Main thing is to wear a mask. Here in Lakewood, there are very few people who are. I know s/o who wore a mask on R.H., but the Shul didn’t require e/o to wear them. He found out later – that a guy next to him tested positive for Covid19 & he wasn’t wearing a Mask!