It is cheap, easy to find and sometimes you can get them for free in certain shops! However, if the films are expired, the seller may give them away. Kodak Ultramax 400 is definitely recommended for most cameras which do not have built in light meters.
This is the film that I started taking pictures with. I don’t have to worry about ISO settings at that time as a beginner. All I did was just load this film and start shooting.
It is suitable for shots for the outdoors as well as indoors. When using this film, you do not need to worry about getting the right exposure in low-light conditions. It also give you the right crisp of color contrast too.