Do it properly. Start with a visa from your home country. Then get proof of residence. Then get ID. Then get a bank account. Make the bank account solid and either put
*****
0 into it or the correct monthly amount of
*****
. Leave it in there for three months and then go to immigration with all the documents. Take someone with you to translate as all Thai docs are in Thai and you will have to sign a lot of paperwork. At the end of this process there will probably be something that you will have missed but you will get there eventually. Do not try to cut corners.