Incoming Sub - Resize bracelet myself or let the shop do it?

[Beowulf]

I have a Submariner Date Ceramic (116610LN) arriving this week. The shop asked me if I want them to resize the bracelet (small wrist). They're not an AD but sourced it from an AD and sell a lot of watches.

What do you guys recommend? Let them do it or ask them to ship the watch untouched and do it myself?

Taking into account:

- I bought a watchmaker screwdriver with four tips (1.0+1.2+1.4+1.6mm). I think it is good ($35) but never really used it before, anything is possible.
- I bought a bottle of Loctite 222.
- I have some painter's tape to put on the bracelet.
- I watched a couple of YouTube videos on how to do it like a boss.

HOWEVER:
- I'm usually pretty bad with this type of precision handywork/fixes. I'm a clumsy mo@#cker.
- Never did it before and don't want to damage anything (strip screws, etc).

What would you guys recommend as the least terrible idea? Do it myself or let the shop do it?