I am scheduled for surgery on the 27th of July. Should I start my liquid diet now or wait until exactly 2 weeks before the actual surgery date? I am exercising and am more conscious about my food choices right now but haven't actually started the liquid diet. any advice would be helpful.

This is really something you should ask your doctor about because each surgeon is different.

You should check with your doctor - he will tell you when to start

Dont start earlier than your surgeon tells you - it will be hard enough. Don't make it harder on yourself.