My wormery has been going about 6weeks +, no sign of any liquid yet, how long does it take?
Can I put chopped banana skins in, we eat quite a few.

Well don't be disappointed but its really very bad idea. The Bananas will be soon rotten and will of no use. It will stinks out. So i suggest you to avoid bananas and would like to give advice to take boiled dry potatoes which could be good for long time. You can apply salt and pepper on it.