Welcome to the forums, @Luke Duffney !
Starting Out: Definitely look at the Education Guides section of BP , there is a ton of information for you regarding finding deals.
Cashflow numbers: Utilize the Bigger Pockets Rental Property Calculator to evaluate if a deal will work or not.
Twin Cities Inventory: I have to disagree, I'm currently looking at MLS deals and am walking several with my agent this Saturday. As of 4/6/18, I've identified at least 15 duplexes that positively cashflow (St. Paul + Minneapolis + 1st tier suburbs) I'm personally looking for multifamilies that need rehab (exit strategy = HELOC) so only a few of those 15 meet my criteria.
Realtor: If you're not seeing 15+ new deals a week, have your agent be less specific with the search criteria (pricepoint, property features, duplex + triplex + quadplex,...) If your realtor hasn't worked with investors, you may be their test run.
Partnering: Profits are shared in proportion to how you divide it (most often by equity contribution) If you and the partner are 50/50, then yes you'd 'only' get 50% of the total profits, but that's also a deal you'd otherwise not have without a partner.
Keep your head up, you'll land something!