As someone who went through her own sexual awakening at the age of 32 and subsequently realised she’d been having bad sex for more than a decade I can’t tell you to do any one thing to make your sex life better.
There’s no magic pill to fix it. Unsatisfying sex lives happen for multiple reasons:
1. You're incompatible with your partner. This can be sexually, emotionally, mentally, physically, you name it.
2. You lack confidence in yourself.
3. You think sex is perfunctory and not fun.
4. Your partner is lacking something.