1) You should fully Americanize all the spellings. It is American English people want.
2) This would be far too boring for me to stick with if it is things like "I went to the cinema yesterday". A coherent story, or even better, a domain-specific lesson, would be a much more engaging way to teach a language. I was able to learn when it was "talk to my driver about the security situation and drive plan", but never cared enough for casual conversation. I am usually happy to talk to people who speak horrible English about things I care about, which presumably for the hn audience is tech, startups, etc., but not about sports (cricket!?). If you could do a vertical-specific sayafter.me it would be awesome.