First, you will just need to click the blue Add button at the top left of the screen which can be accessed from any page you are in Fergus. From there, choose Create Job.
You can also choose Create job option from Quick Actions if you are in the home page screen:
From there, you will be taken to the job creation page:
You can then search for or create the overall client the job is for, select or create a site details (i.e. the location of the job itself and who you will be dealing with onsite), choose the job type and enter a quick title and description like so:
Once done, you can then click the the create job button to finalise it, and be taken to your new job card.
For more info please: