Firstly I would start with the idea that most people don't have a career. Most people have a series of jobs. Realizing this will save you a lot of unnecessary anxiety. You have a job. You will have other jobs.
Try to keep learning new things. As a newbie you have a lot to learn that is directly relevant to your job.
As you get the hang of your job you should start learning more things that are not directly applicable as they will still make you better while mitigating boredom.
