I learned front 2s and front 4s first, then back 2s and front switch up, then back 4. I'm better at front 4s, i rarely do a regular back 4 i think. For 3 swaps I'd say back 3 swap is easier, never done a regular 3swap, I've done unnatural slide front 3swap, so I would spin the 3swap my natural side. Front 3swaps are scary cause you come around blind side the last part of the spin.