I am trying to set up a site to gift a family that attends farmers markets as their income source but have not been able to because of the current situation and some of their own personal losses. People still want to buy from them but they had no way of allowing people to order. I made them the google form she wanted, but I want to do more. I want a wooden... farm-y theme and found 2 I like but they were WordPress and I can't get them installed.

Does anyone know of a site that has good themes like this for free?
Or is anyone willing to help me get one of the WP themes installed?
I know its a lot to ask for free, but I am not being paid to do this, I just want to help them out.
I've made sites before but its been awhile.