Too many nebulous details here to give a good answer. The OP needs to measure the spacing on the dropouts to verify spacing. TT is correct as usual, it is pretty simple to cold set the rear triangle. Care needs to be taken and if it is spread significantly it may require adjusting the fork ends to make them parallel. Not a big issue in most cases, but necessary in some. I feel that is best done by a knowledgeable bike tech or someone who is trustworthy and has done it before.

Edit: Here's info from Sheldon Brown's wonderful site. Note the issue of what he calls "parallelism" which is way down the page.

https://www.sheldonbrown.com/frame-spacing.html