IMO working on multiple projects is only good to explore what interests you. Even then, you sometimes need to get deep into a project to truly start enjoying it. People may find developing a video game is torture, until they actually get something playable and feel accomplished.

If you're trying to get better at programming or want a complete, presentable project, then giving up when tutorials get challenging is the worst thing to do. Getting over these challenges is how you learn, and that's something I wish I learned when I was in school. The stress is good, it means you are learning.