Pick a database my host supports
The best database is one your host already runs and backs up.
I'm building <one sentence> with <stack> on <host>. It needs to store <what it stores>. Recommend one database and defend it: - Which databases this host provides, and which it backs up. - Whether SQLite, a single file, is enough for my scale, and when it stops being enough. - What my stack talks to most easily. - How I'd move to something else later if I had to. Pick one. Don't give me a comparison table.
A database the host already runs and backs up beats a better one you have to run yourself. For a small project, that difference is most of the work.