

Office 365 also refers to the desktop apps as well as the web versions, has done for many years now. Though I suppose it’s all copilot 365 now.
Source: Am office worker where we use office 365, and we all use the native system software, with the browser versions as for quick editing when elsewhere.

I’ll be whatever person I like thanks.
And most open source software starts as a one person job. And as you approach something that other people see the value in, you’ll likely attract people who will help.
For the most extreme example, see the Linux Kernel itself.
Someone has to start the ball rolling, and if it’s something you want, it may as well be you.