What you want to do is spam W on the loading screen. The moment you gain control of your character start making your way to the base underwater. while doing this look at your mini-map and keep an eye out for any gold. After you enter the base you want to open the chest. Press "Take All" and imitatively go to the main workshop, don't worry about anything else in the base. At the main workshop you want to craft an equipment workshop. You want to place this anywhere in the base. You then want to leave and place the Extractor on an iron deposit. Then, go collect 1 piece of gold and the run to the extractor and collect the iron in it (You may need to gather some manually). Then, go inside the base and craft the Iron Diving Helmet. Then jump toward the submarine pieces. You may want to look at your map quickly. Once you collect the 9 pieces get in the submarine and go to the surface.