I picked up some pink Korean item along with a couple bottles of that special sterile water after stumbling across mentions of it. There's also this skin numbing cream in my possession, though I'm unsure about putting it on. Needles really freak me out. It's wild that I'm handling any peptide shots whatsoever, let alone multiple ones under the skin. Time will tell how everything turns out.
I use 25g and they are fine. I use luer lock so I swap to a fresh one for the actual shot and it glides right in. There are tricks like coughing while you pierce or lightly scratching nearby skin to distract yourself. I have also done IM on my partner so maybe practice on someone else first. I believe in you.