Moving from Server 2008 R2 and SCCM 2012 R2

[MagnumVP]

My system currently sits at SCCM 2012 R2 SP1 CU4 on Server 2008 R2.  If I want to move to SCCM CB 1903 would it be best to;

1. Upgrade the existing SCCM from 2012 to CB and then migrate to a new server (2008 R2 to 2016)?
2. Add a 1903 CB to the environment and then swing migrate from 2012 to CB (if this is even possible??)

Also if anyone can answer this (Googled and Bing....without success).  Within out EA agreement I can download System Center Standard/Datacenter 2019.  How does this differ from CB?

Any recommendations I would greatly appreciate.

[anyweb]

you'll need to put together an extensive plan of actions to make sure you can cover everything, your best option is to go with choice number 1 and by the way there is no SCCM CB 1903, it's SCCM Current Branch version 1906 (currently).

To upgrade, start by reading these points.

https://docs.microsoft.com/en-us/sccm/core/servers/deploy/install/upgrade-to-configuration-manager

as you can see there is a lot to review and plan, and that's the first thing you need to do, so get too it and good luck.

If you need some pointers I can include a rough draft of how we did it on one of our production upgrades

cheers

niall