What should I know before applying for the Digital Nomad Visa (DTV) in Thailand?

Good day

Im at the start of preparing my application for the DTV and I have a few things I would like clarifying if anyone can?

1) I understand that the DTV costs 10,000 baht and that is the only fee I pay regarding the visa itself and that is for 5 years (please correct me if Im wrong)

2) I also understand that if I choose to leave the country when my renewal is due, I avoid immigration and the fee that comes with extending the stay?

If this is the case, is the renewal due every 6 months?

3) If for example, I choose the cooking course, am I required to attend for the first 6 months only? I have a genuine interest in learning cooking anyway so this would be my choice rather than Muay Thai which I have zero interest in

4) Has anyine completed a cooking course that could advise me the approximate cost of the course and at the same time, possibly recommend a course

The way I am seeing things in my minds eye is that subject to submitting a successful application, I arrive in Thailand stamped with the DTV for 6 months where I attend classes for that duration. Once the 6 months is up, I can leave Thailand and return for a fresh uninterrupted 6 months and continue this for the 5 years WITHOUT the obligation to continue with the classes, as 5 years of cooking would lead me to be a Michelen star chef!! 😁

I am over 50 and qualify for the retirement visa but I dont feel this is the best choice for me right now. I will look at the retirement visa if and when I feel like I am going to put serious roots down

Im currently in the UK and will be applying form here. Is everything done online or will I be asked to attend a Thai consulate here in England