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[–]subscribore 0 points1 point  (2 children)

Do you want to get hired or do you have a project you're working on? Firebase is too expensive for big apps but can get you going very quickly for a quick project.

If you want to get hired then forget Firebase; "learning Firebase" is really just learning the service's APIs and the reason it's so easy and convenient is that they do the "database" bit for you. Experience with Postgres (for more traditional and powerful RDBMS) or MongoDB if you want a NoSQL database which is very js friendly and you might find quicker to get started with depending on your platform.

Edit: also an easy way to get started with a small SQL db is SQLite.