So you got to step 7 from the manual and tested the OpenCPN InstallPermit ok?
And then - step 8 - you imported first the cell permits (PERMIT.txt) and next the cells/charts (ENC_ROOT folder)?
At this step you should get prompted if you want to create the OpenCPN SENC files on-the-fly while importing the charts
. Did you see this message?
How does your S-63 tab look like?
Any messages while installing?
Did you zoom in until you are getting the green chart indicators at the chart bar?
Where have you doubts about the S-63 step-by-step manual?
Although this works the same under all systems:
Your operating system? Versions of OpenCPN and the S-63 plug-in?