Specifics will depends on the axles and Jeep model but in general you'll need either new axles that are already setup with coil buckets, LCA and UCA mounts, and shock mounts or you'll need to cut the mounts off the existing axles and weld in new mounts for the coils, shocks, and control arms. You'll also need coils, shocks, both control arms, as well as body side mounts. That's more or less the minimum stuff you'll need assuming you simply go with basic coils and shocks and not coilovers, struts, ect. And that doesn't touch on changes to steering setups since that'll be dependent on what Jeep model you're talking about.
If you're not even sure how labor intensive it is you're probably not capable of just fabbing up what you need and calculating suspension geometry with no experience and would likely be better off with a conversion kit. It's a pretty expensive and difficult undertaking if it's not something you're already familiar with.