How do I (m19) go about introducing my boyfriend (M32) for Christmas?

Ok so first of all I already know introducing partners to family's is scary but I have few extra challenges and this is my first relationship ever so everything is new a scary. My family is accepting of my sexuality but there are a few other issues. I've asked my boyfriend for help and he only had one other relationship with a woman before and the only advice he gave me was "just let it happen" but I'm an over thinker so I have a few questions.

1. Interactions and relationships How? Like "hey this is my boyfriend" and then what...? Do I let him mingle, do I follow him around so he gets a proper introduction to everyone? It's only my mom, dad, brother, brothers wife and their two gremlin toddlers. And then how do I interact with him Infront of my family? How do I interact with family with him around? Do I let him have one on one time with my family or do I keep an eye one him?

2. Age gap and questions Obviously the age gap is very noticeable. My parents have known of him since I was 18 since we were co-workers and then later classmates in college when he returned and it wasn't until May of this year we started dating. So how do I adress this age gap? If I do what do I say? If I don't what if they ask?

3. Making him confortable Hes more chill than me but what can I do to discreetly check up on him if he's doing ok if anything's problamatic. My family are Hispanic and they unfortunaly do fall under certain stereotypes on being to harsh so yeah there's that.

I know I'm probably overthinking it but I want him to like my family and I want my family to like him. He no longer has his family because they aren't acceptant of his sexuality and I just really want to really want him to join our family properly.