There's no need to set anything - none of the existing pinion depth, lash, and preload are touched nor are they dependent on the bearing in question. You replace the bearing, possibly the thrust plate and put it back together. You'll want the few seals and gaskets of course and a new stack nut. Beyond basic hand tools all you need is a 35mm socket for the driven shaft stack nut, and a bearing splitter with either a press, or all-thread / H-puller, etc. Besides pulling the transmission and putting it back the whole process takes about 3-4 hours. I've done the whole job with transmission R&R in a day.
There's really nothing else inside these that ever goes bad for the most part so a full "rebuild" is rarely warranted and usually means replacing just worn parts and seals anyway - which will be what I outlined above. Syncro's and the rest of the bearings will generally be fine, and if it's not popping out of gear you are unlikely to need any forks or other parts.
GD