Hi jackintheday,
Thanks for the feedback and the pictures 
Your experience on the mattress will likely change as it breaks in and you get used to a new sleeping surface so I wouldn’t make any changes for at least a couple of weeks (unless you absolutely need to) but there are also some suggestions in post #2 here that may be helpful.
A shoulder issue can often be connected to your pillow as well because a pillow that is too thin for you when you are side sleeping can put additional pressure on your shoulders but one nights experience isn’t really enough to know for certain.
I’m looking forward to any additional updates you have the chance to share.
Phoenix