I made a short vid for you and converted it so I could post it here.
Step by step instructions:
1: log in (obviously)
2: click your banner with your username to enter profile
3: click the garage tab
4: scroll on the left to chooses garage
5: click apply.
6 (optional): change the weather in the dropdown box.
Extra note: you can also press “P” to test drive in your new garage, and then press “O” to edit the range. There is also other range objects you can craft or buy in the market using the tabs on top.
Have fun in your new garage!!
EDIT: evidently the video doesn’t want to work, so just follow the instructions. I tried to fix and it told me no.