I tried high heels once, to a party where you had to cross-dress, in Southland in a farming community - not where I'm from but felt I had to make the effort to fit in...
I don't know how that kind of theme for a party would go down in Russia, but not very well I expect.
The wig, makeup, undergarments, gown - all no problem. The shoes - you can absolutely forget it. I couldn't make it from the car to the front door.
Flats are always preferable to heels. Comfort over fashion any day.
Comfort is good, fashion is good, or is that a problem as well?