Like probably most new shooters, I religiously attached a UV filter to every lens I bought in the beginning. (I also wasted many hours overcleaning my lenses' front *and rear* elements.)
Eventually, I began to relax & settle down, and after a little research, decided that -- for me-- neither never nor always are the best times to use UV filters.
I own one, high-quality UV filter for every front thread size in my lens inventory, not every lens. For example, I have three L zooms with 77mm front elements, but I own only one 77mm filter.
If I'm shooting portraits in the studio, what's the point of a UV filter?
If I'm going to be shooting on the beach in salt air and all that sand about, the filter goes on before I go outside.
But by all means, it's your money and your equipment. Do what works for you, makes sense for you, and gives you peace of mind.