You might not need a passport photo. Last year, the Udon Thani immigration office took the photo electronically/at no cost. They politely told me not to worry about bringing a photo next time.
If you want to play racist far-left delusional history games. “Munoz” sounds like a Spanish conquistador name…maybe you should take responsibility for your family trying to spread their ill-liberal Spanish settler colonialism even further in the New World via a genocide of current long time current inhabitants.
It might be worth considering consulting with an immigration lawyer. Especially if you're not confident after some DIY research. My wife and I married in Thailand/obtained her permanent residency 37 years ago. At the time, it took about 8 months, lots of forms, a physical, police certificate and an interview. Not easy...but the last 37 years made it very worth while.