If you have no teams in Home, the tab will say "Which team do you love?" and underneath there is a search box where you can search for and add your first Home team.
All you have to do is search the teams name and then click on them to add them.
To add more teams, press edit in the top right corner and then a search box saying "Add team" will appear, just enter their name and click on them to add them.
If you want to remove a team, just click "edit" and then press the "X" next to the teams name.
Here is the a video illustrating how to add and remove teams: