I started when I was about your age. That was 40 years ago but we still enjoy dancing socially.
You don't say where you are from, but it is likely there are more places to dance than you may think. Don't expect your studio to tell you about other venues though, they want you to stay with them. Outside of the dance schools news of other dances spreads largely by word of mouth, so once you find one, you will find others.
Dancing is fun, and it is something you can do as a couple, but it can also be frustrating and a great place for an argument. My advice would be to try to avoid the blame game. When a step doesn't work it wasn't either of your fault. Just agree to say "WE went wrong, lets try it again!"
One further tip: If a step goes wrong it was probably because the previous step wasn't quite right, so check that one too.

I am from the tiny island of Malta, so not in the US.

Great idea about checking the previous step, and I do tend to go for the 'your fault' method.
I will work on avoiding that.

Malta is very popular with older Brits who like to spend a few winter months in the warmer climate. I understand several of the hotels cater for them by offering ballroom and sequence dancing.

Sequence dancing uses the standard ballroom and latin rhythms plus a few others, but each individual dance has a distinct name and repeated 16 bar routine that every body dances at the same time (in theory). Because the dancers are typically older the emphasis is on the social aspects rather than technique.

I started competitive dancing in my late 40's and has NO dance training when I was a child.

There are ladies 70 ++ out on the competitive floor.

Samba is pretty advance and is not usually taught until you get some better at cha cha and rumba.

Quick Step has a prerequisite of Foxtrot since it's a faster bit of a variation of it.

My advice is - stay with it! It's loads of information and step patterns, technique at first. It WILL get easier when these things start to become muscle memory.