Depending on where you're based, I would look at getting in touch with some of the angel investing syndicates. Also, be realistic about the runway you're giving yourselves. My personal philosophy is to meet with investors in my network right at launch (not for money, but to alert them that I might be coming to them at some point). These relationships take time, and even an angel investment can take a month or more for due diligence. Expect Series A to take months longer.
Given that you're not currently in touch with angels, I would start identifying 1-2 groups in wherever you're based (I hope the answer is a larger metro area). Find out if you have a mutual contact. If not, and I hesitate to say this, but make a cold call to the angel / angel group. You don't have anything to lose.