Not very important.
I'd say studing openings gets more relevant when the time comes when you decide a pretty much fixed repertoire and aim to play mostly the same setup for comfort. If you are going to play similar setups for 70% of the time it would make sense to delve a bit deeper into it.
I was wondering how important openings are for beginners. I don't really understand the importance behind them. My basic knowledge about openings is how to utlize pawns and make space to develop you pieces and get them to a position where they can perform the maximum effort. This is Pretty much all I find important in openings?