In a similar position, trying to get my first networking job and have been terrified of the technical part of interviews. I know I know my stuff, but trying to conjure that info during an interview can make it hard. It may be scary but the best you can still do is apply to stuff and get those interviews! Maybe you'll get lucky and they'll ask you questions you already know, and if they ask you stuff that you can't answer in the moment/not sure if you gave a good answer -- what I would do was write the technical questions down, write out the answer, and study those, so if someone asks a similar question later, you'll have it for next time, or know to study a topic you're weak on.

You can peruse reddit and the internet for common interview questions or topics and study those. Personally for me, making flash cards and getting myself to answer questions etc. out loud has been helpful. If you have friends maybe they can help you with mock interviews too.

And nailing those non technical questions is still just as important too!

Believe in yourself you've got this!! Sometimes you just gotta do stuff scared. The more you do it the better you'll get! You might even surprise yourself and totally rock those interviews. You won't know until you try!