Let me put it this way....I have educated 4 sons and had holidays for 20yrs on the "loot" from inserting Grommets.......does that qualify me?
You go into hospital, have a general anaesthetic, then the surgeon scrubs up and under an operating microscope identifies the ear drum and using a very fine pair of forceps inserts the tube through an incision into the eardrum.
99% of insertions are dead easy...1% difficult due to the size of ear canal and angle of the ear drum. Post operatively there should be no pain and depending upon your surgeon, you will be able to swim without earplugs.
Antibiotics not needed.
Anything else you would like to know, then do not hesitate to ask.