Thank guys I will probably end up going with the nontoxic acrylic paint with Krylon over it just because it's cheap, I can get it locally, and most importantly it is the least intimidating option lol! Everything else sounds so complicated and scary for a first time background painter lol!

Good idea to use the moss. I should have extras.

Any tips on finding non toxic acrylic paint For Walmart to mix up for me? Is there a certain brand that is non toxic?