I’m assuming you’re a minor and I don’t advocate for breaking the law... but if a minor were to try to order from an online shop (hypothetically, of course), there would only be a couple ways to verify them. One would be a simple age verification that asks for your date of birth, otherwise the other verification usually asks for an actual picture of a photo ID with a date of birth on it. Some sites don’t even ask for any verification.

Also remember that flavor bans are at the fault of minors, and the bad rep of vaping in general is from underage use. Big tobacco keeps using tactics to steer people away from vaping and back to cigarettes. I wouldn’t use either, if I were you, unless you think giving yourself an addiction is fun.