There are specific things that are included in a zero-gravity flight tour packages so you should personally take a closer look which one you think would best be suited for you. For example, part of the tour would be to visit the Cosmonaut Training Centre where you will get to learn many basic things about aviation and space travel.
Also included in the zero-gravity flight adventures tours would be your hotel accommodations and your travel transfers from the airport to the hotel to the actual tour site. Most of the time, these adventures tours also cover for the food so you no longer have to worry about that at all.
Most importantly, there will also be a medical inspection so it could be properly assessed if you are physically prepared to handle a zero-gravity flight or not. Needless to say, these are just some of the many items in a typical zero-gravity flight offer here in Moscow Kremlin.