New to [COD] and getting destroyed every single game ,need help

Hey everyone, complete COD beginner here. I just got a PS4 and downloaded Call of Duty, and honestly, it's been rough. Every single time I spawn in, I get shot and killed almost immediately. Game over before I even know what happened.

I'm not sure if I'm playing the wrong mode, using the wrong settings, or just missing something fundamental. I don't even have time to react before I'm dead.

For those who were once in my position — where do I even start? Which COD game is best to learn? Are there any tips for someone who keeps dying in the first few seconds?

Any advice is appreciated. Be kind, I'm really new to this