First time dosage advice

So me and 2 friends are planning to take 2cb for the first time in about a week and I'm curious at how much i should take, my friend said he got me 26mg. I'm about 6"3 and 158 Lbs (193 cm and 72 kilograms)

I haven't had much expierence with psychedelics, I've done alcohol, weed (not that often), nitrous and I've taken XTC twice (I hallucinated a bit once on XTC)

I'm planning to go for the more psychedelic part of 2cb which i've heard starts at around 20mg and i was hoping for a slightly heavy trip (as long as I don't have a bad trip of course)

I'm curious what you guys think will be a good amount for me to take and advice would be appreciated.