i'm sure you can search the internets for each step.
You will need to remove bracelet first. If you cant do that, then skip all other steps and proceed to a local watch guy.
So you will need 3 tools. A 29.5mm oyster caseback remover, a 1.2mm flat hobby screwdriver, tweezers, and a tube of GS Hypo cement (very much like model glue).
So search each step (e.g. "Removing Rolex caseback..."removing stem from ETA"...etc). You'll be fine.
That is a good watch to experiment/practice on