It all depends on how good a condition your engine comes apart in...
If it requires only the basic new rings and bearing then this is quite easy to do.
No measuring clearences ect.. ( still have to gap the rings though)
As long as you clean everything. blow out all the holes for head studs ect and put oil on EVERYTHING when you put it back together then its an easy enough thing to do... If you have a 4age manual that should tell you everything you need to know...
There plenty of ppl here that can give you tips.
No doubt theres probably some one local to come help you if you get stuck.