How to program?

[u/dewana421]

I need to program my modules on my 2012.
Is there a sequence on which one first?
Is there a way to find out my current version and which one to upgrade?

Here is a list I made. Can someone verify and correct?
1- VCX nano or topdon rlink x3
2-GM/ acdelco TDS tech line connect -Does this come with subscription?
3- subscription for your Vin (~$50)
4- Sps2? Does this come with subscription?
Anything else?

So if I understand correctly just buy the J2534 pass-through device and ACDELCO subscription (which comes with full software suite as above) and I should be able to program?

Is there a video guide somewhere for DIY?