LP-AM263: [AM263x_CC] Do we have any simple 101 guide for AM263x multiple core debug?

Hi, Expert.

As title description, I am very new for AM263x development, and try to find the "most simple" step by step guide for multi-core debug example.

as far as I know, the most simple code is "empty_am263x-cc_system_nortos", when I import this project, it also automatic import another two project "empty_am263x-cc_r5fss0-0_nortos_ti-arm-clang" and "empty_am263x-cc_r5fss0-1_nortos_ti-arm-clang", I guess it should be two program  runs on each core (R5_0_0) and (R5_0_1)

I reference few E2E discussion, and is still feel very confuse.

https://e2e.ti.com/support/microcontrollers/arm-based-microcontrollers-group/arm-based-microcontrollers/f/arm-based-microcontrollers-forum/1171741/am2634-ask-how-to-use-the-multi-core-example?tisearch=e2e-quicksearch&keymatch=Ask%20how%20to%20use%20the%20Multi-Core%20example

e2e.ti.com/.../faq-am2634-how-to-choose-setup-the-dual-core-with-lockstep-feature\

My question is :

1. Why only Cotex_R5_0 exist in core project? 

2. Why default target configure is AM2631? as far as I know, EVM should be superset, why shouldn't we set "AM263X_CC"

3. How to make sure R5_0_0 and R5_0_1 already runs program? because it does not appear any message from COM port

4. How to set breakpoint in this project?

5.When I launch "empty_am263x-cc_system_nortos", nothing happens, what's mean for this status  as below chart?

Many Thanks

Gibbs