Here's my take on this.
We only started using bed pan liners in the last five years at my facility. Each facility seems to do it differently, I've seen bedpans lined with the disposable soaker pads, kits that have a plastic bag and a liner, improvisations on both of these.
Flushing locks? Different supply sources sell different products. For some reason, our new supplier sends IV start kits (which I didn't know existed until I changed units) in pouches that are about 30cm long, not the baggie sized set up.
Use your CNE, that's what they get paid for. They are your resources for pump use, finding out how often lines are changed, etc.
Having said that, a six day orientation for one unit could be considered generous. An orientation is to learn how the unit works, the paperwork flow, and what routines are involved, ie saline lock flushes.
You'll develop a bit more confidence every shift.