Make a copy of the Onshape document. Assemble the model and practice applying limits to the button and hinge. Customize the colors once complete.
Create a BOM and exploded view of your Assembly. Assistance creating an Exploded View and BOM can be found here in this Loom video demonstration.
Sharing with "Can Edit" permissions is a great way to speed up Part Studio design as well as Assembling Assemblies. Practice working in the same workspace to assemble this Selfie Stick with a teammate.