Avoid Frankston North and Carrum Downs if you can help it.
Maybe find an estate in Karingal or Langwarrin or go with Frankston South if you can afford it.
I bought a unit in Frankston South around the Screen Street area just off Heatherhill Road. I was lucky enough to purchase during Covid when things were cheaper. But I also love the Moorooduc Highway area of Frankston South. I used to live in Karingal prior to that but you need to pick your street carefully there. Frankston East/Baxter area is good. Again around Whistlestop Estate you want to choose your street carefully. Olivers Hill and Gould Street are the more prestigious areas.
If on a budget Whistle top estate and Karingal,if you have a bit more money Marylands estate,Lakewood estate,Heatherhill area,Mt Erin area.Money no object Frankston South & Oliver's Hill area.