I had an EMCS last October:
They shaved me with an electric shaver (had it been an ELCS I'd have sorted myself out).
The stitches were dissolvable and most dissolved with no issue, a couple came out a few weeks later in he shower.
The dressing was removed before I left hosp (after 24 hours) after a shower, it didn't hurt at all (I too was dreading it).
The wound healed well, I washed it with water only every day in the shower, each night I sprayed it with diluted tea tree oil and dabbed it dry with kitchen roll.
Like several pps I have had overhang, so I was careful to keep it dry (lying down and airing it at every opportunity).
I showed it to every medical professional I saw, all midwives, at every doc appt, just to make sure they were happy with healing.
I had a very minor infection (staphylococcus which grows all over your body anyway, it was just a by more prevalent around the wound), it leaked a little at one end (transparent or slightly bloody, but only ever a few drops). Antibiotics cleared that up.
Now at 12 weeks the wound is healed, I wash it as normal, it doesn't hurt - just sometimes feels tight on the outside and still slightly tender on the inside.
Good luck!
Ps should I have baby II I'll absolutely have an ELCS