I will take a bit of a different tack. Fiirst and foremost, you should build up a sizable emergency fund. 6 months to a year's worth of all-in expenses would be a reasonable amount. Bad things happen that require cash, and more of them tend to happen when you own a house.
After you get that built up, before you go willy-nilly investing, you should figure out what your goals are for the money and how much risk you are willing to take to get there. This may require some navel-gazing and discussions with your spouse, but the effort is very worthwhile. You do not want to be in the position of "I don't know where I am going, but I am on my way!" When you have a firm plan (preferably put down on paper), you can translate that to a target asset allocation and then commence DCAing into it.
Along the way, make sure you have sufficient life insurance and disability income insurance protection.