I mainly 5 stringers, fretted and fretless, one of which has 19mm spacing. You get used to it in seconds and one of the advantages is playing higher up the board, eg if in F start on the 6th on 5 rather than 1st on 4. You need to stretch your hand a lot less. The 5th is also quite a useful thumb rest 🥴👍🏼
I also have a short scale 4 string and as soon as I pick that up I seem to adjust in the same way as one does if you pick up a 6 (or 12) string guitar.
Don’t be intimidated by the instrument, just go for it.