5 day budget friendly solo trip -beaches, no nightlife

Hi there!

I’m looking at visiting Greece but I’ll be honest I’m overwhelmed. I would love any advice I can get, I’m planning on visiting late September/early October. My main reason to go is to visit beautiful beaches and try their amazing food. When I say no night life, I just mean I don’t drink alcohol.

I plan on spending a day or two in Athens to explore Acropolis, if there are other places you’d recommend please let me know.

I’d like to spend the remainder of my days at one island (due to budget) where I’d see beautiful beaches. What would you recommend for a walkable island? I’ve been looking at Naxos or Paros.

I would like to see Santorini as well, but I’m afraid flying may be out of my budget as I’d need to carry my luggage with me, and I don’t want to spend a whole day traveling to an island if I’m already traveling from Athens to Naxos or Paros Would you say Santorini is a must see?

Would also love recommendations on low budget stays that are safe for women. Truly would love any advice at all!