Assuming you have a Hyperdrive, you are nos ready to build a ship! You are now ready to explore the universe and the great beyond, colonize new worlds, and set up space stations!
First, you will need a layout or a framework for your ship. It is highly recommended to use iron as the main material for your ship, as it is abundant and highly malleable, as well as durable. It doesn't have to look nice, it can just be a box. Then, set up a power system for your ship. Have a powercell, solarpanels and maybe a reactor for your ship to generate power.
After setting up the main framework for your ship, you can place an ionrocket or your ship's engines near the powercell. You should use a switch to prevent the engine from always being on. Afterwards, find a good place for the cockpit of your ship. You will need a vehicleseat, a starmap and a hyperdrive in your cockpit. The starmap is useful for visualizing the area of space around you as well as finding coordinates for the systems around you.