They’re all about prep, if you memorise your examples for each skill & company value and use the star method to back them up, they are a lot easier. In the technical sections, a lot of the time it isn’t about how much you actually get right, they just want to see your thought process and how you apply knowledge/experiences.
Also remember that interviews are usually 2 hours maximum, it’s not the end of the world if it doesn’t go well and you don’t get the job, at least you tried & you can take it as a learning to improve. You are also using it to see if you actually want to work there too.
I thought the interview for my current job didn’t go well & I thought about giving up mid way through (pretending I had a technical issue & hanging up lol) but I ended up getting my dream job from it.