Sometimes I have a vague idea for a question, but asking it right away may result in a confusing or unclear question, or after receiving answers I realize that I haven't asked the right one. Sometimes this happens even when I have researched on it. In such case, is it OK to ask the community first to help me forming the question in metas? This will reduce the time for editing back and forth, or in the case of already getting answer, will reduce the time they have to edit theirs for me.
The question Is there anywhere to get help wording a question? does not have answer about meta specifically. In chat you can only discuss with some people, while in metas it is less fleeting and will receive more attention. If that's a bad thing, then one can argue the opposite that discussing on closed questions should be happened in chat too, not metas.
in the meta it is less fleeting
That's a bad thing here. This isn't the type of thing that actually benefits people to have sticking around.