Next step with a business partner

[Christina Colon]

I've reached the point where I'm ready to partner up! 

my business partner and I have decided to go in on investing together! I want to ensure we do this right, but I feel lost and stuck! 

I'm looking for experience here, we are ready to take on our first deal together but unsure how to structure it so we are both protected. 

My questions are:

How do we legally set our agreement and protect our business? 

How do we file taxes under our business (Our LLC) ?

Who do we bring on board with us to ensure we are legally doing the right moves? 

How do you conquer book keeping if you both have to your personal funds into the deal? 

There may be more I'm leaving out, but any help would be great! 

For transparency:

Our vision is to build a portfolio of STR and MTR. I currently own two STR's and manage his STR.

Thank you all!