You can get E-Juice online locally, but you got to be savvy about getting it with nicotine- which is not legal. You need to understand the slang/jargon.
Download the online shopping app, "Shopee", on your smartphone.
Go to the website https://shopee.tw/
apply for an account and begin shopping!
You don't need to have a credit card, you can pay cash at the nearest convenience store when you pick up your order.