Adding stamps to my profile?

I’m totally new to spacehey and I really really wanna add stamps to my profile! Idk how though :( I can’t find a place to learn to do it anywhere. I don’t wanna edit any of the other parts of my profile I just wanna add stamps. I’ve seen someone post their stamp collections and I’d also like to use some of those! Can anyone tell me how to put them on my profile (´；ω；`)