Hi there, quick visa question for those in the know.

Starting a job at an international school in BKK in August. Applied for Non Immigrant B Visa in the UK, but the embassy was very slow in issuing it. Therefore, to avoid wasting money on the flight, I entered Thailand on a tourist visa. Now the Non Immigration B E-Visa has been issued, I was wondering whether a land trip (thinking Savannahket, Lao), in and out stop, would be fine to active the E-Visa. Any advice ? Thanks 🙏