Real Estate Finance and Investments Bruggeman & Fischer 14th ed

[Glenn Gillen]

I'm starting to get into real estate investing, but I'd like to do some research before I do anything. I took a class that used  Bruggeman & Fischer's 14th ed. Real Estate Finance and Investment textbook, and we were required to use a HP-12c financial calculator for the loan/mortgage calculations. I was not able to complete the course and I'm really rusty on the concepts. 

I found the textbook material to be very heavy and complicating, and I was wondering if it is worth the time and effort to get familiar with the calculations and problem sets used in this textbook? 

I also looked the textbook up on multiple sites, and the majority opinion is that the textbook contains many errors (i.e. incorrect calculations, formatting, and inconsistent examples). Not sure if these errors pose any issue with the efficacy and legitimacy of the book's contents and advice. 

Opinions and advice about whether it is worth pursuing this book would be greatly appreciated!