House and crate training tips please!!!

We picked up our puppy this past Thursday. She is just shy of 4 months old.

I know the crate training will take time as she was in a playpen type enclosure with her siblings previously. I’m also getting mixed and conflicting tips from people I know – cover the crate fully/don’t cover it at all/cover it but leave one side open so she can see out. Also, keeping her from going to the bathroom in the crate. She has peed in it every time she’s been in it. It’s always open so she can go in if she wants to.

As for house training ugh. She was doing quite well the first couple of days. Until today. She had 2 pee accidents when we were visiting with my mom and 2 at home. She will NOT go to the bathroom on walks. Has one spot in the backyard she will go and one spot in the front. I have been frequenting those spots with her and using lots of positive reinforcement with her when she does go to the bathroom outside. If she does have an accident in the house we take her right outside or try to interrupt (without startling/spooking her). My FIL says to “rub her nose in it, tap her on the nose say no and bring her outside.” Maybe I’m wrong but this seems like a really old school way of doing things?

To add. She’s not a very food motivated pup. Doesn’t like treats but will sometimes take kibble as a treat. We use kibble in her puzzle/enrichment toys which she pedicures out very quickly.