How does this work?
Sometimes well, sometimes not. By and large, the more you put into it, the more you get out of it. Everybody who answers questions here does it for fun, so you need to meet us halfway. If you follow ordinary conventions of punctuation and spelling (and capitalization), write complete sentences, format neatly, and take the time to provide enough detail and context that we don’t have to guess what you’re looking for, you’ll get an answer—probably several—provided that . . .
Can I ask any question and you will answer me?
. . . your question fits the requirements described in the FAQ. In a nutshell, those requirements are that it’s got to be a question about the English language (not something else like how to write a novel or how to pick up girls which happens to involve the English language), and it has to be a real question (not a peeve, not a poll, not a dictionary lookup) to which a single answer can be provided in 200-800 words and which is interesting to somebody in the community.
How long does it take to get an answer?
Anything from thirty seconds to a couple of hours; but it’s usually worthwhile checking in every so often for a day or two, because people drop in to answer from all over the globe, at all times of day, and the last answer may be the best one.
By the way, you might want to check this SE site, too, which may accommodate some of your questions more comfortably. It’s on the verge of going to “private Beta”, and if you commit now you’ll be able to participate from the very beginning. You’re welcome to participate on both sites.