Hello, germanbini! I live in west central Wisconsin, near Menomonie.
I'm one who started out using purchased cultures and liquid rennet, but now use clabbered milk (works the same as buttermilk) and yogurt as cultures for my cheese. I also use Junket rennet and have great results.
I have my own cow (Jersey/Holstein cross) and have never tried goat's milk.
Welcome and I say, Take the plunge! Cheesemaking is great.