Making ship parts

Yo I'm new to modding and wanted to know if there was any pre existing resources to help with creating ship parts, I've been modeling for a while now and I just wanted to know how I'd be able to figure out the size/scale of the parts to keep it all uniform and how to center the snap points correctly, the answer is probably looking me right in the face but any suggestions are welcome 🙏🏿👍🏿