Yes, cool_trees modpack and moretrees are supported now. I hope I did not forget any fruit (cacao and plum from cool_trees don't work yet). Fruits from x_farming should already regrow without this mod. I hope you'll enjoy it :)
I'm sorry, but I would call myself a beginner too... So maybe look at existing beacon mods for minetest to get inspiration and begin modding yourself. If you need help ask in the Minetest forums or take a look at the Minetest modding book (https://rubenwardy.com/minetest_modding_book/en/index.html) or something similar.