currently most countries are given 60 visa exempt on arrival, just watch the posts as possibly will reduce to 30 days. What country passport do you hold? I see you have already asked this question in another group and been given alot of information. You need to apply for tourist visa online, not with an agent
the OP has explained in the comments he's english and moving from Pattaya. When I go to Isan there is additional fee to withdraw from Pattaya account, plus complications to get bank letter to renew annual visa
all the rules are the same to live throughout thailand so all you need is transport, then register your TM30 at the nearest immigration and possibly move bank account to that province
Hopefully you have visited several times as many areas are so different you need to tour for a couple of months and understand culture etc before you consider a move. Above post good advise regarding visa requirements