Hello
Well, if this is your first relationship then I think you two are facing things that us older women didn't have to face - and that is, the intrusion of the internet into your relationship.
Either one of you can look at photos of fitter better looking people online all day long, as it is always there and so much of your lives are about online things.
He has normalised this and probably isn't going yo want to change that - he likes big boobed women and he likes looking at them online. He hasn't been taught that this is damaging.
I wonder if he is going to learn it through his interactions with a real live woman - you!
But someone else said it earlier - your relationship should be a safe space for you and if he is too immature to have learned that looking at / ogling other women and then saying 'Yeah her boobs are bigger than yours so you aren't as good as her' isn't going to make you feel nice, then he needs to learn that.
Until he does learn that, it isn't a very healthy relationship.
How would he like to see your content?
Just one thing tho - don't stalk his content too much, as it is his rabbit hole and you don't want to get lost down there...
I'm thinking, you can do better really. Better quality man. But if most young men of that age are doing this, because it has been normalised, then welcome to the dilemma we face - do we want a man if they are like this, or are we more confident and happier on our own?