1. Nobody will ever be impressed with your Hebrew.
Three months in Ulpan and you still won’t be able to order a kos mayim at a restaurant before being asked how your Birthright is going. This applies even to folks who made Aliyah and went through three years of military service — if you look foreign, then get ready for English.
2. Tel Aviv is the New York of Israel.
This means two things: one, you can find literally anything you can think of (including clubs open until 8AM and bomb food from every corner of the planet); two, you can find anything, but the price of a night out drinking will surprise you. I recommend sticking to Goldstar and Arak (a cheap anise spirit usually served in a shot).