Some of the best careers started with a summer job nobody bragged about.

Unimpressive first jobs teach the things every later job assumes you already have: turning up, taking instruction, dealing with a rude customer without going to pieces. Nobody posts about stacking shelves, and yet that is where a lot of people learned to work. The job does not have to be interesting to be the start of something.

Take the unglamorous job if it is what is going, and be good at it rather than above it. Learn the names of everyone on your shift. When you leave, ask one person there if they would be a reference for you.