First lets start with difficulty, Arch isn't difficult but I don't think it will suit you, it can break and you don't want that.
I think you picked a good choice with OpenSUSE, its backed by SUSE, they are doing extremely well and have great characters like Bryan Lunduke in the community.
I would use OpenSUSE Leap due to stability, also it relies on BTRFS, link this with snapper and you have the ability to rapidly revert from any issues.
YaST is also a brilliant tool, allows you to easily configure things.
Check out the OpenSUSE one click installer, its rather cool for a lot of things, it does require Firefox to work though.
Stick with OpenSUSE Leap, its a great offering, seems to have everything you want and is stable which is what you need for work, plus its more up to date that things like CentOS/RHEL.