Trying to conceive…please don’t judge…help!

Sorry if this is TMI but I need advice. How am I an almost 30 year old woman and don't know the answer to these questions?! I grew up in a VERY conservative home. I received religious education and never got "the talk." My fiancé and I get married very soon and want to start a family right away. I have had sex before but always protected. When we are trying to have a baby, what do I need to do after he ejaculates? What happens after that? I heard that women have an increased risk of UTIs and yeast infections. How do I make sure this doesn't happen on our honeymoon? I feel so silly asking this but I don't have anyone else to go to. My fiancé is just as clueless when I asked him. This is why sex education is so important! Anyways, any help would be appreciated and thank you for not judging!