After you subscribe in FunRetro you will be redirected to your dashboard. In your dashboard you can click on "Add team" to create your first team.
After that you name your team and click on "Ok".
You will be redirected to your teams page where you will be able to invite your team members.
You can invite your team members by clicking on "Invite members by email".
After you type your team members and click on "Invite Members", they will show on your team as "Pending" members.
Your team members will receive an email and they will have to click on the invite link, register in FunRetro and accept the invite. After that you will be able to see that they joined your team and they will be able to access your team boards.