It‘s a good idea to buy half a size too big. You should allow some room for a bit of swelling of the feet. Ideally, buy them in the afternoon when the foot has expanded a bit.
To protect your toes and heels from friction, especially in pointed high heels, apply Elastoplast SOS Blister Bandage Small for your toes and Blister Bandage Large for the heels.This will take pressure off the affected areas. Also, adding padding at the ball of the foot will reduce discomfort when walking.
Really know how to work those heels
Wobbly steps are not very elegant, and will also put you at risk for ankle injuries.
In heels, much of your weight rests on the balls of your feet, which means that walking requires a whole different way of walking and a different motion than you would use when wearing flats. Aim for a heel and ball-toe motion: with the heel and ball hitting the ground at the same time.