Use of relational databases?

I need the player to input text in a fairly complex way, using dropdown boxes filled with choices taken from relational databases, with some serious nesting involved. How do I do that in Unreal? I’m fairly far along learning Blueprints, know SQL a bit, and know C++ least of all. In any case, what’s the best way to set relational databases up in Unreal as I prototype my game? I hear it’s C++, but can I then use that setup in Blueprints where I know my way around more? Thanks…