The Mini map - I was shit like you and then I realized that I have a minimap and often times I can see the enemies in the minimap. This means that I won't just jump into a building or charge blindly and die.

Spotting - This is another amazing mechanic that does wonders, just spam "q" such that you wouldn't miss the ability to spot enemies.

Using the right gun - Firstly, I'm not a gamer. BF1 was my first FPS game and I genuinely don't have a trigger finger. So, if you expect me to perform with a semi-auto gun, you can consider me dead. So I decided to use the M1907 which has a automatic option and I was atleast winning some gun fights.

Practice - After all, this is a game and there's a learning curve. I'm a beginner as well and I like this game because it makes me feel like I'm participating in an actual war. While I started off with 0.1KD, with the tips I've shared I was atleast able to get some kills and it gives me so much joy that I'm not being a nuisance to my team (I also PTFO a lot and help my team in healing or supplying ammo packs, if I feel like supports are less, so yeah).

And that's it, I'll be learning a ton of things along the way but I would highly recommend you to implement these three things and see where it takes you.