Create Instant messaging app like whatsapp or youtube?

I love chatting and sharing photos and videos with my friends on social media, but lately I'm thinking a lot about creating my very own Instant messaging app. So, how does one go about doing it?

>>4
Easy: hex-encode the string. It is impossible to express racist, misogynist etc. ideas using 0-9A-F, so you're safe.

On a side note, b64encode(b'qCm}G$') =)