Hi Michelle,
Welcome to SCN 
Training Development, Change management and PM assistant sounds great.
If you are keen on moving on to SAP with PM roles, you can consider going for SAP PM cert:-
https://training.sap.com/shop/certification/c_pm_71-sap-certified-associate-project-manager-g/
However, if you are interested in SAP and want to move towards Functional or Technical Consultant roles, then you have to understand which fields of Modules you would like to be in.
But do check out S/4 HANA, which is the new thing in SAP.
You can even enroll the free OpenSAP course via the link below:-
Last but not least, if you are keen to move on with PM role and not limiting only to SAP, consider PMP certification.