Every time I've gone over to someone's place, I've always felt nervous and unsure of what I can and can't touch, so I was thinking of how I could make that less so should others come into my home

I'd show them where these things are in case they want to make themselves food:
Fridge
Trash can
Paper towels
Plates/bowls/cups

I'd show them where the bathroom is
I'd point out rooms I wouldn't like them to go into

I'd do all this, right after entering the home, so they're not uncertain like I would be

I know I'd appreciate it very much if someone did this for me, so if I bring someone who might be nervous, I hope they'd appreciate it too ^w^