Coding Confusion

I've been thinking of upgrading how the bio post for both of my deer looks but I normally just go to Toyhouse for codes haha ^^'

Idk if there's a different sort of thing I should be doing, I suck at coding, but I'm a bit jealous of all the pretty posts I see! I've tried pasting in all kinds of codes just to see what sticks here and what doesn't and it's strange. I don't know if the html truly doesn't work in these forums for whatever reason (even the most simple, bare bones codes I could find) or if it's the preview feature that won't show me what it'll actually look like, but a nudge in the right direction could maybe help?

if not, I'll just keep it how it is, maybe point people to go the deers' TH pages and call it a day lol