Where should I invest my savings for my first house?

My wife and I are both 22 and are just getting started with our investing journey. We’re both pretty frugal and have agreed on a budget that will allow us to save $400k in the span of 5 years to use a down payment on our first house. We’re currently maxing out both of our Roth IRAs, matching our companies 401k, and have an emergency savings account already in place. As we save this money for our first mortgage, would it be best to put this money in a generic brokerage account invested in the S&P, an HYSA, or somewhere else? Any help or guidance would be greatly appreciated.