1) Teach someone how to do it correctly, without weight or with a shoe. This is critical. If this is not don't the Turkish Get Up becomes and American Roll Over.
2) Tell the to do Turkish Get Up 2x/week for 8 minutes at a time
3) Let them move up in weight when they are ready (they will know when they are ready)
==> I got someone who was barely able to do one unweighted to doing them with a 16 kg FLAWLESSLY with a 16kg) in about 1 month.
The TGU is self correcting, don't overcoach it.
Also, if they don't have kettlebells they can still practice at home.