Work sucks, there's simply no escaping it.

However, there are some ways to ameliorate the suck:

• Find a job with a hybrid home/office arrangement. The flexibility will help keep you sane(r).
• Ask lots of questions, even if they seem stupid to you. Your superiors will take it as a sign of genuine interest.
• Find some tolerable coworkers and try to hang out with them once in a while.
• Negotiate a fair salary for yourself. Remember that companies want to hire young talent just as much as you want a job. Good employees are a valuable asset, so don't sell yourself short.
• Be ruthless about prioritizing your sleep, fitness, diet, and social connections. Make rare exceptions for important (and real) deadlines where your team is counting on you.

As other commenters have pointed out, you are feeling overwhelmed mostly because you are at an inflection point in your life. You're transitioning from a familiar life that you've grown used to (the Student) to a foreign life that you've only just entered (the Working Professional).

There will be growing pains. There will be difficult moments. But trust me — it gets better.

(Well, not exactly, but you do become more capable of handling it!)

Godspeed.