Am I eligible for a Thai Digital Nomad Visa as a freelance remote worker without a formal contract?

Hello, a big thanks to all the members of that group for the help provided !

So in my case, i am a freelance remote worker and as a freelancer, i don't have any contract from my employers to show (and i'm just working for one or two clients max for now) and i don't necessarily work for them every month (last year i worked for them 7 months in a roll then 5 months pause).

This year, well, i don't know, i will see how it goes, there is no certainty, it can stop from a day to another or i can also be working all year...

And i don't send an invoice each month, rather a note of copyrights (as a writer/adaptador) to the client who pays me 45 days after but each note is dated monthly, like a bill or a paycheck....

I have the amount (500K) they ask for on a bank account.

All that being said and thank you to those who read me until the end, do you think i can be eligible for the DTV, and if yes, how should i do it ?

Thank you !!!