Can I exit Thailand, visit Cambodia, and re-enter on a tourist visa to apply for a Non-B visa?

Hello,

I am from the UK and have changed schools and my old Non B Visa and work permit was cancelled so I'm on a covid extension visa now until March 30th until I get all my paperwork for my new school ready.. Can I just exit the country on March 30th and do a quick 1 night trip to Cambodia or somewhere close and come back in on a tourist visa of 30 days and then go to Chaengwattana to apply for my new non b visa ?... Or do I need to get a 60 day tourist visa before I come back in to apply at chaengwattana? Thnaks for any tps and advice 🙏