The opposite end of the tab will be more in the center, and it will be the end to physically open the indentation. If you can’t get your finger under the tab, use a butter knife or other flat object to pry the tab up.
Hold the can on a stable surface to avoid spilling it.
Make sure you have a firm grasp on the can with your other hand while lifting the tab to prevent the can from moving. The bottom of the tab will put pressure on the part of the can that opens, making a hole once the aluminum is pierced.
Pour the drink into a glass or cup, if possible, to avoid cutting your lip on the pierced opening.
This method often creates a loud pop when successful. Make sure the object isn’t sharp—you’re trying to create friction, not tear the lid open with the object.
Do this with the butter knife facing away from you for safety reasons. You can also use a flathead screwdriver.