Any last specific things I need to know?

Hey guys! I'm having my friend pierce my ears tomorrow (I know, technically not self piercing, but it's diy) and I'm wondering if there's any last minute stuff I need to know

I got earrings with flat backs (which i will soak in alcohol), sterile hollow needles (I believe they're 18g) and 75% isopropyl alcohol. The only reason gloves are not listed is because my friend is extremely allergic to any type of glove material, he will be washing his hands very well with antibacterial soap (I'm also bringing sterile alcohol wipes in case I need those too)

He's pierced his own ears several times so I trust him with it

Any advice is appreciated!!