Welcome back to the hobby/addiction! I suggest finding a nearby club. That will be the best way to see what the hobby is like now. And the club will have all of the launch equipment that you will ever need.
Assuming you are in the USA, there are two national rocketry associations. Both are great, so just find a club affiliated with one of them near you:
https://www.nar.org/find-a-local-club/nar-map-locator/
https://www.tripoli.org/Prefectures
There's so much that has changed since we were kids. For example, rocketry simulation software (
OpenRocket), GPS tracking, and electronic deployment control (you will probably want to get
this as you get into bigger rockets).
When I came back to the hobby a few years ago, I read the quick start guides on the
Apogee Components website over and over. One of them in particular was called "
I want to fly bigger rockets!" I remember thinking, "They just read my mind!"
But for now, just have fun. There are plenty of build threads on this forum about the Saturn V, but you may want to build a few other rockets to hep you get back in the groove.