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Actually, for beginners or someone who has just joined the forum they don't have to be able to provide good and quality postings right away because this depends on knowledge and experience, the most important thing is to understand and comply with the rules that already exist in this forum.
Some of the aspects of writing that you convey are true, and in my opinion if we make a post using all the aspects that you convey then maybe it will be a post that has good content and has very informative value.
But unfortunately, to make our posts considered quality or not, this is what we cannot control or we cannot control because quality or not depends on the recipient or the judging reader.