Part of the problem you’re having might be that sheet music is octave-specific, note names on the neck isn’t. Like, you might know that you have an F on the 1st fret of your E string, but that doesn’t tell you (directly) which one of these F’s it is in the sheet music -
(it’s the lower one - the higher F would be on the 3rd fret of your D string)
That’s why I have the location of the open strings on the staff in your Course Extras booklet on page 22, to give you a starting point for determining which octave a note on the staff is in on your bass. Here’s something similar I just spit out of Sibelius -
I agree with @Gio’s advice above too - don’t try to get it all at once, just gradually get comfortable with more and more spots on the staff, and then you can just navigate from your ‘safe’ spots until you’ve got it all.