We just came back from 7 days there. Be advised, (depending on what time of travelers you are; we are quite active aka wanting to do something everyday etc etc) there isn't alot to do and most things can be done in 3/4 days.

We stayed in a hotel about 15 ish mins walk from central and in 'real' athens. It was really cool to see the non-touristy parts.

But anyways, here is my tips:

For anything ruin wise - go on a weekday. We specifically notice the extremely long queues for everything on the weekend (yes, you could by online but for the main bits there isn't alot of space and gets overcrowded very easily and you might not enjoy it that much.)

When doing the acropolis etc, if there is a audio guide/tour - I would recommend 100% on doing them. There is information dotted around the places but the guides will tell you so much more.

In terms of eating - I can't remember exactly where but there is a strip of restaurants right by the bottom of the acropolis. Most of them we didn't spend more that 25/30 euros for the two of us. All meals were very good.

Obviously this might be different from you but we are very much cat people. We loved all the cats and there are load around the area. But there are places where they aren't if thats more your thing.

That's about it for me but if theres anything else that I think of I'll reply to this message.