Well, first off I would suggest to focus in on one thing you want to do. It can be tough to get going when you are bouncing between different ideas (flipping houses, rentals, house hack).
Now once you get some experience then you can dabble around in between different strategies but it would be my advice to just focus on one for now.
If you are gonna be house hacking or just have a rental property or 2, then i don't think a LLC is necessary. Usually a umbrella policy can give you enough protection from liability. Eventually, you will want to move everything into a LLC but at the moment it is not important (others might disagree).
To answer your question on private money, it depends what you are looking for. There is money everywhere but you have to have the right approach and most likely some experience to get access to it. For a beginner, your best bet will be hard money and there are a lot of national and local hard money lenders. Go to your local meet up or ask around and you will find where the money is at.
Feel free to message me if you got any more questions!
-BA