Online help ?

Is there any place to find any sort of documentation on how the app works (e.g., how to send a message or wave to other riders, what the power ups do, etc)?

All on the search above.

so tell me every time i open this swift do i have to reinstall. I opened up zwify it recognises me and welcomes but has no offer to ride. Where the hell are the options to ride. I find this the most frustrating program I have ever worked with. 

Have you downloaded the program and not just this site?