I talk about discovering your passion and how that aligns with your goals and REI strategies in my 10 Step Guide for Buying and Holding a Small Multi-Family Rental Property (now available for download in the FilePlace).You've taken the right first step (joining BP).

It will convert pictures of paper invoices or whatever into PDFs on the fly wherever you are and you can email them to yourself, then either put them in an email folder for each property, or what I do, download them from email and save them in dropbox (I prefer this over google drive) which uses normal windows folder, and organize digital folders for each property and have subfolders for insurance, loans, tenants, appliances, repairs, you name it.

I talk about this in my 10 Step Guide to Buying & Holding a Small Multi-Family Rental Property that is now available for free download in the FilePlace -> eBook section. 

Sorry in advance for the low res image. you can right click and download and zoom in for better view...

Is that something I have to buy or can I download for free from a website?

It downloads a blank spreadsheet.  

Let me take a listen and download the book.

Calculating the cost of everything (Regarding your ink toner, if you're using a laser jet, it should tell you the estimated yield, so you just divide that by however many pages you're printing), downloading handwritten fonts to Word, even getting my Bulk Mail Permit, etc., but it's just not worth the time & the headache doing it yourself.

You can download the 'meetup' app and look up real estate to find all the local REIA meetings nearby.  

I have a 10 Step Guide available for download in the FilePlace and Step #1 is Identify Your Purpose and Set Your Goals.