I got curious, how long it would take to reach 10'000 h of drinking.

So if we take the recommended 2 L per day and take the unrealistic low assumption of 10 mL per sip, that makes 200 sips per day. Let's say you are trying to learn drinking and therefore take your time doing it with 10 seconds per sip. That would mean 2000 seconds per day drinking. Times 365 makes 202 hours per year. And so to reach 10'000 hours to call yourself a master drinker, you need to drink for 49,3 years. So the person in the picture is just too young, keep at it!