There are a couple of related things which might have an effect.
If you play left-handed, then you need a left-handed bass. I have the impression that for left-handed basses the choice tends to be smaller and the basses often more expensive.
Also you might find it harder to find a teacher who's left-handed, which could make it harder to teach.
It will be worth doing some research. The For Sale section here separates left- and right-handed basses; have a look, see how the number of basses available compares (because I might be talking complete nonsense ).
Good luck whichever you try.