Probably took too big steps in remesh. Eager to add details. Sculpting is about taking small step, each time adding details. If you have problems now, then for sure it will increase further when adding details.
- If you use the multires modifier, go steps back
- Simplify the mesh by hand (remove loop cuts, merge verts - Use Dyntopy (dynamic mesh density)
- Decimate modifier
- Hide parts not working on the mesh
- Check memory usage OS (disk swapping etc.)
- Start simple, because it is probably your first sculpt, learn the process and capabilities of your machine
Yes, now you know your machine maximum. Manage your projects with this factor.
If experimenting in settings, do keep a backup!!