Easy! Text is the fastest way to accept Requests, which are filled on a first-come-first-served basis.

When there is an open request, you’ll receive a notification like this:

To sign up,

• tap the link provided, or
• reply to the message with the given keyword. (sub 0a2f in the sample image above)

When you are confirmed, you’ll get a confirmation text.

What about multi-day or long term assignments? 

Use the provided link on your phone or computer. (You cannot sign up for these types of assignments via text.)