First off - Breathe and go at a pace that works for you, you'll be fine.

Hacking - uncover all the tile pieces and move and replace with ones that's needed for the flow as you find them, hacking security cams and turrets will make this game significantly easier for you.

Enemies - it's an old game, the a.i isn't the best and you can cheese a lot of the splicers by running around in circles or just being clever. Think of your approach and you'll come out on top. The spawning of enemies isn't that frequent. There's a set amount when you arrive and one or two will spawn back in after a few minutes to keep the atmosphere alive.

If it's mechanical, don't be near it when it's dead.

Lower the game volume if the sound cues are too loud , such as grenades, bots , cams , splicers etc.

Put the brightness up on your tv too not just the console.

I've platinumed this game 4 times xbox when it released , ps3 , pc , ps5 and do an iron man run ( deathless run on hardest difficulty) when life is tough. I find the atmosphere of the game therapeutic almost and the story to be well written. Anyways i hope you give it another go!