First step would be to get whatever bass you have set up correctly - nice low action (so the strings are not really high off the fingerboard), nut slots are cut correctly for the same reason and to ensure that the intonation is good (so what you play sounds good and in tune).
Making sure all this is done first will ensure that your learning experience will be a pleasant and fun one seeing that you won't have to fight the instrument needlessly.
I wish I knew this when I started learning! I would have progressed a lot quicker if I had known.
I don't think Rickenbacker have made C64s for a decade or more so would have had the dual trussrods (especially because they were the more pricey "vintage correct" model. Kinda. A right handed version of a lefty...They also didn't have a zero fret.
I'm going for a HW custom order tribute passed on as genuine.
Happy to be wrong but that's where I'd place my bet.
These days I view myself as the instrument and basses as tools. Keeps things simple that way, and also silences that confusing voice of sentimentality.
Strangely, the new 2023 4003 basses now have a single trussrod, whereas the 2023 4003s basses are advertised as having "an improved dual truss rod system".
Typo or just Rickenbacker being Rickenbacker? 🤷♂️
Reduced to £320 posted.
I'll also throw in a mix bag of all the strings I have in my drawer here to experiment with. New and used, all top brands, used strings all usable and barely used. Cut for Fender so will fit most basses out there.