How to get over restaurant anxiety

I just arrived in Korea about a week ago, and I have only attended one restaurant -- it was one where you order from a tablet. I studied Korean for about 6 months prior to arriving, and have (in theory) enough Korean to order at a restaurant, get a server's attention, and tell them how many people are in my group (1), but I am just too afraid of misunderstanding something, or looking like a dumb American. I've just lived off of convenience store food and cooking myself after going to a grocery store. I have no friends yet, but the language school I'm attending starts in a few days, and sorta just waiting to get friends before going out. Any advice on getting over this anxiety and just walking in? Some more context: I'm 19, in my gap year before college, first time in Asia and first time living alone for an extended period of time. Any advice would be appreciated!