It was a telegram bot during covid (India), The backend would look for vaccine availability by calling the govt covid api's for vaccine availability. Then it would would connect to a telegram bot and alert subscribers when vaccine became available with hospital addresses, and no. of slots available. It was limited to one state, there were similar bots but it was a good project to do :)
What if you are from a developing country and have to rely on subtitles to understand the sequence, and also you cant read fast enough and hence you need to rewind sometimes to retain the sequence. Is this good or bad?
Your already have an audience. Your co-workers at your office, start an initiative like "know PHP" or "Email writing". Send out weekly e-mailers on it. Get feedback from your boss and co-workers. You communicate and you get feedback.