It is not difficult! By reading and selectively viewing you tube vids I taught myself to graft last year. As a consequence all my hives have 2017 queens with six in reserve in nucs. OK, First batch the take was only 25%, but better on the second. Can only improve with practice at grafting ( which is only one way of rearing queens). 100% mated, and all were laying well.
Thoroughly enjoyed it and has added a new dimension to my beekeeping.