Am drinking about 1 1/2oz at a time. Howy minutes do I need to wait before I begin to sip/drink again. Going through that fear of Over drinking & stretching my pouch or causing it to leak.

Just go very slow. Everyone is different so it's hard to say. For example, I was told to drink the 2 oz over the course of a 30 minute period taking little sips. When I got home, it drove me crazy to have to constantly sip on something so I'd just sip until I was satisfied then put the shake in the fridge and came back about 30 minutes later. I always had my water with me though. You'll get a feel for your tolerance and sometimes it takes you to over do it to gauge it. That's how I was. I was afraid to do too much and then worried that I wasn't getting enough.

Liquids can't stretch your stomach (you have a stomach, not a pouch) or cause a leak. My surgeon said no more than 2 oz every fifteen minutes, but early out I couldn't even manage that. Just do the best you can, protein first.