Will the Tourist Exemption Visa still be 45 days or will is get reduced due the shorter stay in ASQ?

Hello Guys,

Will be traveling to Thailand in April and really confused as to which Visa I should be applying for. I want to stay for a prolonged period and at least 6-9 months if possible. Was thinking about STV, but I am reading mixed experiences which has made me a little skeptical. Here is what I am considering and need some advice:

1. Suppose I enter Thailand on 14th April with STV and I renew on 14th July for another 90 days, can I renew again before 30th September which gives me another 90 days?

2. I enter with TR Visa. I get 60 days, can I extend 30 days and then apply for ED Visa? If (can) I apply for the COVID Extension (if still available) for 60 days, can I then convert it to ED Visa?

3. I enter with Tourist Exemption Visa. I get 45 days, can I extend 30 days and then apply for ED Visa and same as above If (can) I apply for the COVID Extension (if still available) for 60 days, can I then convert it to ED Visa?

Nationality: Indonesian. Flying from Bali-Jakarta, Indonesia.

Thank You for any advice possible! :)

Stay Safe!