Okay, the problem isn't necessarily with the character ideas.
The problem is that you're obviously really new to this and the writing standard simply doesn't match up with what's expected. Writing on a mobile or not, your posts are completely lacking in proper punctuation. In none of your posts so far have you used a single full stop to end a sentence.
Additionally, with a bio that brief, it's extremely doubtful that any in character posts you make would really be long enough for casual. If you want to make bullet-point style bios without punctuation, you'd be better off joining roleplays in free.