Thanks for your post and so excited to see that your sofi surprise made it to you! The surprise pebble allows us to verify that our limited edition Pioneer Packs will make it to your front door safe and sound, and so we use this as a confirmation of your verified address. (You can also find the sweet backstory on these pebbles just here: Sofi Surprise 🎁 - #32 by Kaveh)
Now that it’s arrived, simply tap the compass icon in your sofi app to be taken to your pioneer journey map where you’ll find the next step of your journey highlighted in white. By tapping there, you’ll be promoted to upload a photo just like the above (except this time, with the pebble in your hand!), so that your address can be verified.
Finally, the two last steps remain which will be re-confirming your delivery address and completing a short 2-question plant survey to help us the best plants for you in the future and a moving forward. Finally, your Pioneer Pack will be reserved and shipped to you in the next available wave 
I hope that helps, and please feel free to reach out anytime if you get stuck!
Kind regards,
Alex