[@LemonZest1337] Its not that hard. It really depends on what your rigging for tbh. SFM for example is from what I understand an FK rig with specific bone names so SFM can convert some of your FK chains to IK chains. Otherwise it'll only import deform bones and their parents and nothing else. If your rigging for blender/maya/ext, then you get access to consrtaints, drivers, easier IK rigs with a lot of options for them, and just a lot more things you can do since you can use empties and control bones and everything. Rigging itself with deform bones is about as simple as making your skeleton, letting blender auto rig, and modifying the weights after the fact.