I’ve never done it. Over a couple of years of seeing people have problems for one reason or another I’ve just never bothered. Sort of like having to go to
****
to pay water/electricity bills. I know done is done and I have proof in hand when it’s done.
Nothing wrong with online, I just don’t trust anything without absolute confirmation.
Noticing how something that represents existence with no pacification needing a name? That’s how foreign it is? 🤣
“What should I do? Nothing. 😳”.

Fwiw collectively IG and tic Tok are probably the worst representations of Thailand life publicly posted I’ve seen so hopefully you’re preparing in other ways. 😉
The answer to your question is yes. If your visa is issued after you’re in the country you can do a border run to activate it. I was in Thailand 3 weeks before mine was issued.
My vote would be the non OA multiple entry from your home country. Then you can keep your finances in your home bank which is preferred if it generates interest.
Each time you leave you should get a new 1 year stamp for up to 2 years maintaining the insurance requirement.
I ran into this a bit and if I recall you have to submit the insurance papers with the visa application so there is going to be a lack of sync regardless. But it’s still a better deal if you want to keep your money in your home country bank.
On my last half of my OA second year and so far it has been a better investment than the non O because I gain interest on my money sitting in my bank at home where Thailand really doesn’t pay interest.
It’s more important to get your application in order and correct because if you get it wrong you have to pay again.