Questions on financing rental property and keep adding

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From the newbie, who at this moment is rather overwhelmed. Hi everyone! I just attended Brandon's webinar on investing in rental properties (I'm still going through the beginner's guide in investing) thoughts are racing, trying to catch up with them....I know that I can find answers to most of my questions here, but I feel I already have so much to learn and maybe getting answers through a discussion may save me some time or give me a better direction.

1. If I have a mortgage for my home residence (bought it almost 2 years ago) and have some savings on the side that may or more likely may not be sufficient for a down payment for a rental property to avoid PMI, I expect (as far as I know) that for a second mortgage on an investment property I'd have a higher interest rate. Is there a way to avoid that while still going through a bank for a loan? Would doing this as a company (LLC, S-corp...LLC under S-corp) be handled by the bank differently/better/worse than doing it as an individual? (I know this question opens up a whole different topic and if opened I'll appreciate every piece and bit of info but if and how it would affect the loan terms is the main question)

2. Assuming I go ahead with a second mortgage and get my first rental property and all goes well, and I feel I can further expand, get another property. How many loans can one get through a bank???? Is it even an option? Is it a good idea to expand so soon? Or should I ask how fast would it be reasonable to move on to getting a third, fourth, fifth property?

3.  Always referring to rental properties, if I find a private lender (I still need to get the lingo down but I think I am talking about hard money lender, OPM, if these two are not the same), what is the lender getting back? Monthly payments with interest? If so, from what I've been reading so far, it seems that private lenders ask for an interest rate higher than what the banks usually offer. So in what situations do I use a private lender/individual, as opposed to a bank? And the big question is about profit of course.. if a good cash flow is indeed 100-200/unit/month...how is this feasible with a 7, 8, 9% interest rate? Or is this taken into consideration when deciding if a purchase is a good deal?? I.e...what goes in my pocket after my lender gets his/her share?

3. From what I've been getting here,  a cash flow of.. think was 100-200/month/unit after all expenses is a good deal? If you have a partner and you split this up...so.. 50-100/month...can you help me see how you can build -  I will use the word- wealth? And to make sure I am using the right term.. cash flow I understand as the "profit", what goes in your pocket every month. Am I correct?

Well.. there were a lot more questions when I started typing but can't think of any more right now...thankfully. The reason I am overwhelmed is partly due to the many aspects to consider and get educated on: legal, taxes, finances, loopholes, etc. When do I know enough to go into action while minimizing chances of making a wrong decision/bad deal, etc (especially the very first deal)!!! It feels as if I can read, and read, and ask, and attend webinars for months in order to be well informed on all levels and for the types of investments I am interested in (as of now it's rental properties and flips which I haven't even gotten into as far as getting informed). Is there a safe "learn as you go" case here? I.e do I focus on the REI portion, plan, make a deal for a rental property, and then learn about taxes, 1031 exchanges, how to avoid high taxes when selling a property, what to do if you start with or add a partner down the road etc?? From what I read/hear here, it sounds as if people attend a webinar and go ahead weeks later and hit a successful deal.