@ Gaurav Seth - I am a notes investor and specialized in 2nd NPN. Yes, I flip notes instead of flip houses :)
So, you need to decided whether you want to investing in 1st or 2nd lien. And performing or non-performing notes. As they are different in workout and exit strategies
Like any other profession, you need to know what you doing and notes investing is no different. The key in notes investing is "you make money on the buy". So, know the in-N-out of the due diligence process is the key and the must have skill/knowledge to be success.
There are quite a few web sites that you can check out - see below
https://www.pprnoteco.com/ - Dave Van Horn is the CEO and he's a regular contributor to BP and have a weekly article on the notes investing. Also, I believed they have a notes training course as well.
www.FCIExchange.com - you can register and buy notes from the website. However, their price tend to be on the high side.
Happy Notes Investing!
Cheers,