Re: Meditation ... Advice appreciated.
Hearing sounds, "seeing" things, having vivid dreams, etc. etc. etc. are merely signposts. Acknowledge them and let them go - move on. "Meditation" can be done standing, sitting, walking, or lying down. It's what you "do" when you're "meditating" that's the key. But you need a teacher who can guide you, especially if you have to ask the question.
My advice is to seek a qualified instructor in your area who can help you.