It looks like you're new here. If you want to get involved, click one of these buttons!
First, create your campaign. Then, make sure your friend is signed up with Skwyre and that you know their email address.
After you've created a campaign, you should see a menu indicator (three buttons, "...") on the right of that campaign's entry in the home page. Click/tap that, and you'll get a menu. One of the items lets you invite people to join the campaign. Enter their email address and click/tap "Invite". Your invitation will show up on their Skwyre home page when they log in to Skwyre.