Chris Voss's negotiation course was beneficial for me.

Make sure to connect with local lenders and brokers, as it's beneficial for achieving your real estate goals.

They have some events, virtual meetings, and in-person trade shows where it might be beneficial. 

In a DST, investors purchase beneficial interests rather than direct ownership of the underlying real estate asset.

First, even an STR that isn't rental arbitrage may in some cases be reported on a Schedule C rather than a Schedule E depending on whether you provide "substantial service".In the case of rental arbitrage, I believe the best and arguably only acceptable choice is Schedule C. 

So.... for buy and hold, 30YFRM/10YARM is always good choice.

It is never a binary decision it is a choice especially for a beginner like yourself.  

I suggest that you tune in to the BiggerPockets podcast as it could prove to be beneficial to your learning. 

Make appointments to talk about your financial status, investing objectives, and borrowing choices with possible lenders.

And no I am not set on Condos, I just didn't think I have too much of a choice!