In online forums, the danger I've experienced is the "national" effect. 

Any suggestions?

I've consistently written about the forces of nature and her current and future effects on the real estate market (even while often being ridiculed and politicized on this very site for it) regardless: I personally moved and invested in coastal Oregon in 2018 from Venice Beach Los Angeles partly as a result of the trajectory of climate and have assisted several clients that specifically purchased on the Oregon Coast for their own 'climate havens,' investment and future retirement homes. 

If not, what will you suggest me to do?

Does anyone have a recommendation of a national collection agency that is effective?

I would suggest you hire an inspector as well as have a general contractor go out to the property.

Begin by targeting distressed properties in gentrifying neighborhoods, securing financing through hard money lenders or private investors, and focusing on cost-effective renovations.

While I did not work with other agents or lenders for this particular deal, my professional experience ensured a smooth transaction and effective project management.

Does anyone have any advice or suggestions they can give a beginner such as myself?  

Good on your friend for suggesting house hacking a duplex.