Not to discourage usage of OSM at all, but you can absolutely download offline maps on mobile with Google Maps, they’ve just hidden it a bit. If you tap your account icon in the upper right, a menu pops up that includes offline maps, and it’ll let you select boundaries to download.
Anyone thinking that lemmy is a welcoming space to women should read through that thread first.
Edit: the current state of Lemmy and the fediverse reminds me heavily of early reddit, for better and for worse. You can curate some pretty supportive communities if you are careful picking them out, they remain well moderated, etc. But there are plenty of places where you’ll get scummy content if you wander or if posts attract too much attention.