@sharif.islam, I recall your comment on this topic last November, and please consider my response at the time.
It would be difficult for already-busy collections staff to find time to train themselves using online materials. Resources of that kind already exist but are not focused on the needs of collection managers. I suggest the “roadmap of DiSSCo” needs both capacity building or off-loading (see here) AND a dedicated helpdesk to assist with problems as they arise.
As you say, this requires planning and commitment. It won’t happen if the goal is simply generating DESes, with data quality to be dealt with “later”.