Hey @Haley Thornton, welcome to the BP community!
Well the good news is that it already sounds like you have more hands-on experience than 99% of people who get started investing in real estate. That renovation experience will serve you well in single and small multifamily long-term investing. With this experience, I highly recommend you look into learning as much about the BRRRR strategy as possible. This is a great way to build a solid long-term rental portfolio much faster than most strategies. There is a book on the subject written by David Greene that you can get here on BP or on Amazon (probably cheaper).
Unless there is another awesome market that you already know better than Atlanta, I would advise you to stay close to home. Understanding the market you invest in is so important that it does not make sense to invest out of state unless you have to. Plus, even though Atlanta is hot and the market is competitive, it's still a fantastic market to be in, especially if you are playing the long game.
The best way to search for property depends on your strategy and stage of investing. Start with the "easy" stuff like browsing Zillow and getting yourself a great agent. This is essential while you're in the education phase because you will need to analyze a bunch of deals to understand the numbers and your market. Later on, you can start playing with off-market deal generation via wholesalers or actually contacting homeowners directly.
Financing on SFR and small MF is relatively simple. The strategy you employ will determine the kind of financing you need. If you go with a relatively turnkey strategy then you just need a traditional lender to get a conventional or FHA loan (or VA if you are a veteran). If you go a more creative route, like BRRRR, then you will also need either cash, hard money or some other form of private money to get into the deal. Then you will need that traditional financing to refinance the property after it has been rehabbed and rented.
Operating the properties will take some trial and error but there are great books out there to help you mitigate this. The Book on Managing Rental Properties by Heather and Brandon Turner will serve you well here. Other operational stuff like book-keeping is relatively simple until you build a large portfolio and then you can always outsource.
I love your plan. Too many people educate themselves a bit then skip the whole planning part and try to jump right into REI. You'll be saving yourself a ton of time and headache by building a solid plan. This doesn't have to be anything crazy but having a set of goals and a vision of how you are going to get there is a must. Without this you'll just wander around jumping from one strategy to the next without really committing. But don't get stuck in education and planning land - as soon as you think you might be ready, dive in!
I am happy to recommend more books and sources of education plus answer any questions you might have along the way. Please, feel free to message me anytime!