Wanted to add my own two cents on top of what's already been said: starting at a half-milligram each dose sounds reasonable if side effects worry you, and I'm generally a fan of splitting doses, though I'd go with two equal halves if hunger noise shows up a few days after that first shot, since a quarter milligram probably won't do much.
Also agree that dosing on a Friday makes sense if you're aiming for peak effect over the weekend.
Protein shakes really are essential, personally I like a particular ready-to-drink brand, smooth texture, plenty of flavor options, always keep a few stocked in the fridge, and lean on one as either the earliest or the very final thing I eat most days.