I strum with my index finger, mostly the nail. I keep the nails grown out on my right hand just for this, ok, and I’m a woman and I like to have long-ish nails. Nail erosion is not usually a problem for me, but once in awhile I break a nail doing non-uke things and I really hate having stubby to no nail then. I have bought a couple of fingerpicks, a normal one and an Alaska Pik, to experiment with the next time this happens, but as of yet haven’t had to use them, so can’t report on effectiveness.
I just got a gel manicure for the first time a couple of weeks ago and it really adds a lot of thickness/stiffness to the nail. Probably prevents nail erosion and breakage to some extent. I don’t know if something like that would be an option for you?