What should I know about entering Thailand on an ED visa after previous tourist visas?

Hello everyone!

Coming back to BKK. I had before 2 back to back tourist visas (and got red mark with the second one) and just got my first ED visa. I've read that I could have problems in airport, I'm flying to Don Mueang..Maybe you can give some advices? Maybe you know what they could ask and how to solve this situation? And the most important question: if they will not let me to enter the country, what will happen with my visa? Will it be canceled? Or if they will say no, I would go to Laos and cross the border by land? Thank you so much🙏🏻

UPD: Just successfully passed Immigration. I went to the lady that was smiling, so more chances of her good mood. No questions was asked, just looked at passport and stamped. Thanks everyone for help