Whoever said blueberry and fire was shitty weed doesn't know what their talking about. I've never smoked from a coke can, however, i have heard it's not the best tool to get high. Don't worry about it bro, once you get that glass pipe you'll be fine. Just make sure you inhale, hold it in for at least 5 seconds, try and french inhale too, then the thc in the smoke will get caught in the mucas membranes and makes it travel faster to the brain. IF you can't french inhale, then just breath the smoke out of your nose for the same effect. Try rolling a joint aswell and see what the difference is. Good luck, peace.