If anyone can answer this, that would be greatly appreciated.
I would recommend using an actual CAD/CAM program, such as Autodesk Fusion 360, instead of using a 3d model program. Not only will this be able to directly export you finished model to Cura, and the models are made in a way that works with a 3d printing slicer, there will be more help around 3D printing for it.
Although it is slightly difficult to use to start with, as you become more proficient, it is a very powerful tool to have. . Fusion 360 is free for hobbyists or students. See this link for help activating: https://www.autodesk.com/campaigns/fusion-360-for-hobbyists.
Another option would be SolidWorks, although you do have to pay for this option, but it is much simpler to work with in my opinion.