Well practice makes perfect and the scion wood make quality makes a difference also. Also peach and apricots for me are the hardest with the plums being in the middle and pears and cherries being fairly easy. My first time I must have done about 20 grafts and they failed because they were wrapped poorly and dried out. So make sure the unions have good cambium contact lined up and pressed tightly together. Good cuts no whittling, just one or two nice cuts on the scion and the rootstock depending on graft type. keep the union and scion from drying out by keeping the union well wrapped and sealed. I also use a antidessicant such as Wilt Pruf on my scions. Some people here I think I’ve read cover them in bags with a few holes poked in it for ventiliation. I’m sure there are other methods and Im sure others have great pointers also. There is also a whole thread I think devoted to grafting on this forum i think also
Beginner Grafting Guide. PM me if you want the scions Ill be available tomorrow I76 and Federal area between 1145 and 1400 and all day Monday. @danCO
I don’t know if you have done much reading but here is a couple of good articles on grafting.
Bob Purvis on Stonefruits
University of NH
Washington State