Nothing wrong with putting yourself into the history books.
It might be better to say that, unless you are going to places that involve long jumps, range is more about travel, although, going back to your stated intention, it is important to know that Beagle Point requires a jump range of ~33 LY. You can get that with Jump Boosters (jumponium), but a Cobra can get to the needed range either through Engineering or the Guardian FSD extender.
Guardian tech is an account unlock, not a per ship thing.
Below is an un-Engineered, but with Guardian FSD build that will get to Beagle Point without jumponium.
A ship builder, outfitting and comparison tool for Elite Dangerous
s.orbis.zone
You could add range to it, but that would be making the course change, thereby reducing the things you see. As was pointed out above, travel and exploration aren't always the same thing.
P.S. Don't forget that buying a vehicle Bay doesn't include a vehicle in the purchase.