Relational database design is all about normalization. Get to at least 3rd normal form https://www.studytonight.com/dbms/database-normalization.php https://www.

Relational database design is all about normalization. Get to at least 3rd normal form https://www.studytonight.com/dbms/database-normalization.php https://www.studytonight.com/dbms/database-normalization.php and you'll likely be good unless you're migrating from something that exists today and is already massive.