Is it weird for a (30M) to date someone 10years younger??

I'm a 30y male and about a month ago I asked a 20y female coworker on a date.

Honestly, I was just expecting (hoping) for another casual sex since that's all I've been having on the last few years. Even forgot what it's like to "think about someone else"...

Anyway, we went out for a couple dates until we eventually hooked up. The think is, I've started to like her, you know? That weird gut feeling you have when you meet someone you can watch Lotr extended with! And, lucky me, it seems she cares for me as well.

There's only one thing that's kinda messing with my head and it's our age difference (30m and 20f)... I've already told my parents and she told hers, none of them made a big deal out of it, which helped me calm my nerves... But with that said, what I notice mostly about our age gap is our lack of common "things"... It's kinda hard to put it into writing, but try to picture the situation: Im a 90s kid, we all have those unique moments/musics/movies/events along those 10y to share and make jokes/references about. She "doesn't know anything" from that time, which I think it's normal considering her age, but still... Besides, she's quite shy and a bit distracted sometimes, so some conversations are hard to maintain (ofc, it depends on the subject and moment of conversation).

Spite all of this, everytime I see her my heart starts pounding like crazy! She worries about me and shows a lot of love and affection. And, c'mon guys, we do need some affection shown to us as well every once in a while!

This is probably stupid and pointless, but I think what I'm trying to ask is your advice in regards of am I worrying to much about all of this unnecessarily?? Should I just stop being a lil'b and enjoy while it lasts? Or am I feeling this way mostly due to lack of affection/intimacy from previous relationships?

Thank you all for your time reading and appreciate your feedback!