Welcome, Tayman!
First suggestion, search back through the archives and see what;s already there! I'd say most of your initial questions are already answered there. Once you get an idea of what works, what doesn't then you'll be able to narrow down what's best for you. Not putting you off at all, it's just that there's a BUNCH of info stashed right at your fingertips and it's cool to read up on the many different conversions done. If you get tired of that just punch Jeep or Cherokee in the search engine and you'll have lots to read!
Enjoy yourself...