You can access the Manufacturing window by tapping on the Industry icon.
The majority of ships in-game are created through the industry. The premise is simple, buy a blueprint of isk the market (They are seeded in most NPC stations in some form, however rare or unique blueprints can be in certain locations, such as the Garmur/Orthrus faction ships in 5ZXX-K), use that blueprint in the industry screen and it will show you what you need to produce it. Supply them materials, click produce, pay a small isk free and your production order will start. Larger ships and modules take more time to build and cost more minerals and isk.
The key difference from PC Eve of note: Blueprints in Echoes are ONE TIME USE items, for PC Eve players, imagine every blueprint to be a 1 run BPC and you'll get the gist.