Husband, sex & TTC

So my husband doesn't really expand his horizons in the bedroom. We've been together 8 years and I'm starting to get a little bored 😢 I ask him what his fantasies are and if he wants to try something new but he just freezes and gets awkward. I have tried to introduce some toys and it's just not his thing. I really want to spice things up, especially bc TTC can start to feel like a science experiment. Do y'all have any advice?