but it is valid for 48-72hrs. I.e. the reservation can be used to secure an actual ticket. Long enough to satisfy airline requirements for onward travel.
if you have difficulty filling out the form, you can ask questions here. There's only about 5 questions and 4 documents you'll need to supply... Not very difficult. Maybe difficult for a YouTuber though.
don't listen to agents! Go to the evisa website and apply for a non-o visa before you come. The process is easy, but a bit tedious. But very doable without paying someone to hold your hand.
If your get a tourist visa, it is valid for 60 days. If you arrive without visa and you're from one off the 90 exempt countries you will get a 60 day entry stamp. Both can be extended by 30 days for ฿1900. Any time you exit the country without purchasing a reentry permit automatically cancels whatever visa your on