More open & better sex life

Hey guysss. So I normally don’t do stuff like this. I’m usually quite private with my sex life but I’m also a very sexual person, so it’s a weird grey area I live in. Anyway, I’ve been dating my boyfriend for three years now. We’re at that point where we’re trying some new stuff to keep it exciting in the bedroom. I’ve only been with one other guy (and only one time) so I feel rather inexperienced compared to him. There’s a lot I wanna do, but idk how to bring it up, or get him to do it. Like should I be spontaneous, do we need to have a serious talk about it, like idk...some of it is simple stuff like I want him to talk dirty and stuff but some of it is like kinky shit like him tying me up or something. I guess I just need advice and tips on how to bring up this stuff with him and be more comfortable with my sexuality in general