I have been stuck on this one for longer I'm willing to admit

I think I found what I need, but I'm really not sure what to do with it, if anyone could either pm a helpful thing, or just point out what I'm supposed to learn, I would be extremely grateful. It's not that I don't want to learn it, I just can't figure out how. And yeah I read all the posts and the only thing I learnt was I'm a complete dummy. So please, help me

edit: there's nothing like asking other people for help that makes me push harder, I went to make coffee thinking about it and got it

it's pretty easy.
