Beans are just about the best source of plant protein, yeah. Grains and nuts have protein too, but nuts are definitely pricier and grains have pretty bad carb/protein ratios. If you can't eat beans for whatever reason it'd be a serious commitment to be vegan! No shame in that.

As an aside, I actually have nothing against eating bugs like crickets and mealworms etc. It makes me a bad vegan but I don't really care about whether or not bugs have feelings lol