First oral experience

Today I had my first oral sex experience with my boyfriend. In the past I've thought this was disgusting and horrible and i said I would never do it. But with him I just wanted to, it was a different feeling about it. So we did and ahhh we didn't use a condom bc he thought we didn't have to do how to I save myself from stds now? And also I want to enjoy it more, any tips for being less nervous?