Can I apply for a Non-O marriage visa through the Thai e-visa website and do I need a flight booked?

Hello,

I’m in the UK and on the thai e visa website applying for a non o marriage visa

(1) Firstly am I in the right place and can do this on the thai e visa website?

If I am then..:

In the selection of “Visa type” I selected

“Non Immigrant Visa”

Then the next section is says

Purpose of Visit

The closest I can see to marriage visa is

“To stay with Thai family residing in Thailand (more than 60 days)”

(2) Is this correct?

I notice also that they want a flight date and flight number.

I was planning on booking the flight when the visa was confirmed.

(3) do I need to have a flight booked when applying for the non o visa?

(4) Also I was wondering can I get a multi entry permit at immigration with this visa when i arrive in Thailand?

I intend to arrive August 1st for 14 days and apply for my 1 year extension then.

Then Fly back to work in the uk on August 14 and then return to Thailand on About September 28th.

And then stay till late April 2025

Thanks in Advance 🙏