New begonias- diagnosis?

Hey all! So I have wanted a begonia maculata for months, it’s been my #1 wishlist plant. My mom just saw these two on the Lowe’s clearance rack for very very cheap, so she decided to rescue them. One is looking pretty rough. She said they are both in bad soil and quite dry (shocker) but she doesn’t see any pests off the bat. She will of course isolate them anyway.

Would love to know what might be wrong with this one? She said it has these brown patches and they feel very dry. I’m wondering if it’s just a watering issue, or a fungus/mildew issue, or what? Any thoughts?

Thanks so much- would also love your best care tips!!