"How far should I edit it? I don't want to get question banned."
The Help Center article on question bans explains:
How can I get out of a question ban?
- Begin by improving your existing questions: do as much as possible to make them clear, specific and on-topic.
- The ban will be lifted automatically by the system when it determines that your positive contributions outweigh the cost of those questions which were poorly received.
Stack Exchange cannot lift question bans by request.
- Edit all of your questions, paying special attention to those that score 0 or less. All questions are expected to be useful to future visitors, so put effort into writing with proper grammar and spelling, formatting your post so it can be read easily, and providing as much detail as possible about your problem and what you have already tried. Then write a title that summarizes your problem so that others encountering the exact same issue can find it.
IF editing your closed question could (possibly) repair its shortcomings and is likely to result in upvotes then edit your question correctly. Address helpful suggested shortcomings and duplicates in your updated revision, the first edit may automatically enter your question into the ReOpen Queue.
Don't invalidate existing answers nor challenge that since your question was closed any answers ought not to have been posted; giving you free reign to maximize the extent of the alterations.
Improve essentially the same question, or abandon it (at risk of a ban) and ask a new completely different one.
Sometimes you can improve a question, other times you simply can not. Blanking a bad question and using it as a space to ask a new question, circumventing a ban, is likely to result in a ban being manually applied.
Remember that even if you are banned you can ask again 6 months later, a really great question, and dig your way out of the hole.