Someone talk me through starting a wikipedia page?

Is it about you or your company? Because that's the catch. Wikipedia strongly discourages writing about yourself or anything you're paid to promote, and you're expected to declare a conflict of interest if you do. The bigger hurdle is notability: the subject needs significant coverage in independent, reliable sources like proper news outlets or books. Press releases, your own site and paid features don't count. Without that, a page gets deleted no matter how well it's written. If the sources exist, the safer route is to create an account and submit a draft through Articles for Creation so experienced editors review it first. If they don't exist yet, work on getting covered and come back to it.