> Can we have a categorization of questions like beginners, intermediate or expert?

It can't work because there is no objective 1-dimensional metric.

It's in the eye of the beholder. Are you

• a programming beginner but expert in HTML?
• or a SQL-wizard struggling with GUI programming?
• a super guru who can't speak English?

Learn categorizing threads by title and contributors. Good questions have good titles.

Otherwise something like "Need HELP pleeeze!" is easy to categorize.