Finding your first job especially in the career path you want always sucks and takes ages, unless you're one of the lucky ones. But don't lose hope. Just keep trying. As tough as it gets, if you want it bad enough then someone will see you and hire you. Focus on your own game. If a company rejects you, take time to ask them for post-counselling advice on where to improve then work from there. The only time you are guaranteed to NOT get that job is when you stop trying.
It does get stressful a lot of the time, so focus on things you enjoy. Make time for hobbies or small random goals you want to achieve. I know I was getting super stressed with university and finding a job myself so now that I've finished the semester I'm dedicating all my time to try and make a working gold farm since I enjoy rs. Try a sport maybe. Find like-minded and motivated friends to talk to about your goals and your stress. Talking about your problems is a good way of unloading and de-stressing. Everybody says that but a lot of people are too afraid to approach others about their problems, which is a pretty bad issue. Anyways, don't get yourself down because we're all in the same boat at the end of the day. Take pride in your struggles so that once you make it it will feel that much better. Keep your head up and just keep swimming, you'll get there one day.
TL:DR; Don't worry too much about your job, if you keep trying you'll get there. In the mean time, when you're stressed do shit you like and interact with like-minded people to let go of your troubles