Hello 🙂
For the sign up option to appear, you need to enable that anyone can register in Settings > General , this will enable the sign up and the create account in log in modal 🙂
Users can create groups from the groups page, if you want a button on their profile i can create it for you, but remember to allow users to create groups in buddypress settings 🙂
For the photos in profile you need rtmedia plugin, and enable comments on media, like the attachment.
Hope it helps 🙂
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