Handwashing, good health, preventative vitamins with zinc and isolation from KNOWN risks and early ivermectin or hydroxyquinone if symptomatic. Quercetin is good too, if no heart issues.
Masks are better than nothing if you have to go out and you might or might not be carrying covid to prevent your own or others’ droplets from spreading but no masks up to n95 will prevent viral particles from spreading; the pores between the fibers are too large to contain free viral particles. There is some limited benefit for masks against droplets, at least until the mask gets damp then you might as well use nothing and the mask itself may be a concentrated biohazard to others. You might as well be wearing space suits and our society will not stand for that. So know when to use masks and know when you might as well ditch them and breath the good air freely as God intended.
I’m told at work(my hospital) that the cdc is allowing up to eight people who have been vaccinated to be together maskless in work rooms and meetings. Small dinner parties may be acceptable.
You said, “the pores between the fibers are too large to contain free viral particles.” That fails to consider the electrostatic properties in the mask fibers. I have posted articles that explain this effect. If you don’t believe me, I can post them again. However, I have a sense that anything I bring forward, you will not believe. That puts the whole discussion on the level of faith rather than objective thinking.