Can I enter Thailand on a visa-free stamp and extend my stay while applying for an ED visa?

Hi,

I am a bit confused because of the visa requirements and possible overlaps.

Briefly to the info, I am 36 years old and from Germany.

The situation is that I have planned on the last trip to stay longer term in Thailand with the ED visa. Unfortunately there was a death in the family and big family problems, so I had to go back unexpectedly. I had applied for an ED visa through a language school, but did not come to pick it up because I had to leave quickly.

The last 3 Thailand trips were from

15 October 2022 - 30 October 2022 = 16 days (stamp on entry)

8 January 2023 - 29 January 2023 = 22 days (stamp on entry)

2 March 2023 - 13 May 2023 (45 days + extension) = 73 days (stamp on entry)

I want to go back to Thailand as soon as possible and apply for ED visa again to stay there long term and to learn the language. I am guaranteed to be able to fly from 8/27/2023, possibly even earlier.

Could I now enter again without a visa, i.e. only with the stamp at the airport, or from when and then extend this again by 30 days? If this is not possible, could I apply for a 60 day visa, or does the 180 day regulation also apply here?

The application for the ED visa is relatively lengthy on site.

I would be very grateful for help.