The @Dave Meyer book Start with Strategy will also be a good resource.

BiggerPockets is full of resources designed to help you along your journey, whether you are just getting started or a seasoned investor.

Here to be a resource. 

You've definitely come to the right place to find resources and connections.Here, you'll find several knowledgeable and experienced agents who can help guide you in securing the right property.

so he has an initial negative equity in excess of $100k.so -$100k / (a very small cash flow when properly allocating for expenses and vacancy) equals years before there is any cash flow.  

Thanks for the response, Caleb.Not a ton of savings that I could allocate towards a BRRRR.

Are there any key resources, platforms, or strategies you’d recommend for a beginner? 

I always suggest that for new investors, as their is a wealth of information and resources there. 

I find it's very personal, and dependent a lot on your goals, resources, risk tolerance, location, experience, etc.

@Daniel Baker I would say a lot of it is based on their training or their resources that they utilize to complete your taxes.