My spouse and I are under 30. Looking into investing

So I know nothing about investing other then the obvious that it grows your money. I don't know the where, what why when to buy/invest into. I recently pay off my car and other big things and it's time to invest. I can easily throw 250usd and let's say my spouse 100-150 usd a month into whatever grows your money. It seems roth ria is the path but it seems Roth ria is like the platform and you have to buy index/funds inside it so that's where I'm at. I just need guidance. Do I speak to a Brooker /lawyer? Im sure I'll get lost once I open a Roth account. Thank you