@kobygold for an electric, I dumped the artist signature-model Music Man guitar with the “narrow” 41mm nut and played an inexpensive Les Paul copy with a “standard” 43mm nut. For an acoustic, I bought a steel-string dreadnaught with a “standard” 43mm nut. These are similar nut widths to most guitars used by rock & pop music players.
The “wide” 48mm+ nut width, and therefore, wider string spacing makes it easier to pluck individual strings with your right hand, which is the common method used in classical guitar playing.
I agree with the other posters who say that you should not buy anything right now. If you are interested in learning “classical” style guitar playing, it sounds like you already have a guitar designed for that purpose. I do suggest you take it to a Luthier to make sure it is set up properly (correct string heights, neck has proper relief, new strings, nothing broken, etc.) as there is nothing harder to learn on than an improperly set up guitar.
If you are instead interested in learning rock, pop, blues, metal, or more contemporary style guitar playing, you will eventually want to transition to a steel-string guitar with a less-wide neck. No need to rush into any decisions like this, as time and experience on the instrument will guide you towards where your interests truly lie.
However, at this early stage, playing on a 48mm+ neck is no problem. What matters at this stage is to build up the callouses on your fingertips while learning how to place your fingers in the right places, move them smoothly and accurately, and learning not to press any harder with your fingers than necessary. If the strings don’t ring out properly, it’s almost always because you are accidentally touching a string that you don’t want to.
I suggest you delay buying another guitar until your fingers no longer hurt while playing the guitar you already have (assuming it is set up properly).
Transitioning from a 48mm nut width to a 44mm nut width will take some getting used to, but I wouldn’t worry about it at this point. The basic skills you need to master at this early stage are applicable to guitars of any nut width.
YMMV