You most likely do not want to run a mainline kernel / system. Run Armbian instead, it is Debian optimized for SBCs, it has a very good track record and sometimes is the only option after manufacturers stop creating images for their old boards.

Generic images / mainline kernel might underperform in your board, the GPIO and other low level components will, most likely, not work and you might burn your storage as logging and other I/O intensive operations aren’t tweaked for SD/eMMC. Armbian aims to fix all those issues and provides continuous system and kernel updates long after the manufacturer stops doing so.