The best way is to go to work during the day and study at night or on weekends.
Now that the situation is like this, I personally suggest to remedy it from the following aspects:
1. Seriously evaluate whether you have really learned something about embedded Linux, and you still need to continue to consolidate it in the job search process.
2. Continue to increase the intensity of submitting resumes. Sometimes the arrival of a job depends on opportunity.
3. Job opportunities are related to the workplace. If there are no suitable opportunities in the local area, you can consider other places.
4. It is suggested not to be too demanding, but to find a job, and this job should enable you to have a better development in the field of embedded Linux system.
Finally, the embedded Linux system is in great demand in the Pearl River Delta and has broad prospects. I wish you an early arrival at your favorite job.