Priscilla, I am sitting in my. Hotel in Monemvasia currently. Doing similar route as you are planning.
We are doing-
Athens -3, ( one day was 3 island excursion, inc hydra) Athens is good to get your feet wet in the Greek culture. Great public transportation, we got 2 day transportation passes out of the machine- 4E( nice change after. London which was E12- Stayed at Davini Carneval. 5 star, very inexpensive. 7 min walk to metro. Two stops out f center city. E-90. got it on Booking.com, which I had a lot of good luck on.
Delphi-rent a car and drive to and spend 2 nights. 2( cooler, quite, inexpensive, really nice)
Olympia- stayed at Pension Posidon, George the owner, ran the tour h in the Olympic Games x3, he has pictures and his torch.
Kardamyli-2( incredible didn't want to Leave. Must stay at Annika ot sister hotel Lakonia. Got it out of sleeves book. Incredible beach and pool access. Rooms ha be mini fridge that they presto I with local wine and milk. Incredible.
Monemvasia- kinda have to see it, but was really quick. Stayed at flower on Monemvasia- bare bones basic . I splurged for bigger room and balcony with view. e105, clean but basic- it's 95F, here now, never cools down.
Naufpolio - ( supposed to be specacular, Mycenea and effadariuos side trips - no resorption a going to find a small room to rent.
Corinth-no reservations
Athens-2- thinking about what the other comment guy said about Athens gate. Will check out out.
" my husband had to fly home for work, so here with my 17 y/o son... Wouldn't recommend it... I am basically alone" Greece could be very romantic, lots of families with children under 13. And couples.
What would I have done differently,
Nothing really
No flushing of toilet paper out of Athens-
Learn some phrases, hello- YASAS
Please- -para-ka-LO
Good morning- kalimera
Oh- outside kadimyli- drive to kasinia- it's in guildbook, BUT ON THE LAST HAIRPIN TURN, with the DONT CRASH mirror. DONT DRIVE IT. Park outside and walk up. It's the town square. There are a bunch of 80- 90year old locals. Go to the cafe and sit and eat or drink something. Then walk around. Very traditional village. Be quite. Don't expect English. Looks incredible. ... I drove into the city center and the locals looked at me like I was crazy. I couldn't figure of how to get out. One f the locals could say"welcome and city center". My son was so petrified by the ordeal he wouldn't let me go back up and see it. Go see it.. It was incredible looking.
Sturdy shoes, now 95f with % humidity.
Oh- rental car- my husband used rental cars.com. We had a disaster. Went to pick up car at airport, confirmation said Ace rental cars, there is no office for Ace at airport. Number on form was in Portugal and not a working number. It ended up being given to Goldcar- which was fabulous once we got there.
I can't think of anything else. Hope you have a great time.
Let me know if you have any specific questions.
Karen