How can I stay in Thailand for long

Is it possible to get into Thailand on the 30 day tourist visa (from the Netherlands) and get married and then apply for the Thai Marriage Visa? My girlfriend is a Thai national and I want to marry her and be together in Thailand. I am 44 years old and not eligable for Retirement visa. I just want to get to her (we have not seen eachother in real for almost 2 years due to covid) and be together in Thailand and never be apart again. How do I best do this in regard to visa? Thank you