If you are hired for a project and it appears under your "My Jobs" tab, there's really no point in sending an invoice. If you just want to, you can make up one of your own and send it I guess. I never send invoices to my Upwork clients, but some do.
By the way, offering a 100% money back guarantee and being available 24/7 will only set you up to be scammed. I'm not so sure that profile photo is you either which is a major policy violation.
Make sure the client hires you for a contract before you start working on their project. To find out how payments are handled for different types of contracts, please see articles below:
Please, note that information you provide on your profile including your profile picture has to truthfully represent your identity, skills and experience. Somebody will follow up with you directly and provide more information.
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