I’ve exported from DesignSpark and Eagle, both should be fine once you get the file naming and format sorted out. If defaults don’t work, play around with the settings and if stuck ask questions here.
If you already use DesignSpark Mechanical then that may be the easiest path for you.
I started out with Altium years ago when it was Protel, inherited a bunch of stuff in Eagle so had to become familiar with that, played around with DesignSpark for some larger boards outside my Eagle licence limits, but if I was starting again now would probably go with KiCad.