If English is your 2nd/3rd/4th language, you are not held to this standard.
- start sentences with Capital letters
- end sentences with periods
- break thoughts into paragraphs
This is a technical community with highly skilled members. We need to keep the level of discourse at a reasonably understandable level.
Think about it: others are more likely to respond to your question if you ask it clearly. I've been running this board for well over a decade. Well-phrased questions get more answers.
Writing is all we have, save for the occasional but very helpful(!) photo/video.