Is system shock 1 scary i want to know if i should be careful going into that

And what about 2

System Shock 1 graphics don't necessarily make it "scary" by modern standards. It can be stressful as you navigate the maze-like corridors and low-res graphics, the implications of SHODAN's experiments of mutations and cyborgs allude to very scary material, though you only get pixelated NPCs that don't move all that much, so it's more like you're hitting animated GIFs with pipes and ray guns.

Conversely, System Shock 2 has better graphics (even moreso with mods) that help you visualize the body horror of the infestation happening on the ship you're on. So I would say they're both scary for different reasons, but System Shock 2 significantly more, both visually and audibly.

There aren't any cinematic "jump scares," though, like modern video games where they would play like a super loud noise to scare you. No, the dread happens mostly through the amazing audio. You generally hear these poor monsters before you see them, and it really makes it all very creepy.

You can look up "Let's Play System Shock 2" on YouTube to get an idea if you'd like the game or not, but personally System Shock 2 is one of my favorite games of all time.

System Shock 1 is too aged for me, but i have played 8 minutes of SS2 and it seems quite modern in terms of gameplay. It's past 11 pm here and i cant be bothered to continue today, though. But it looks cool

There's no jumpscares per se. But shodan will play tricks on you. Deadly tricks sometimes, however if you take precautions like saving and finding the restore bay on every possible level then disabling the cyborg conversion you will have ample room to explore and die with no significant lose of time.

I love SS1 more than 2 so I wholeheartedly recommend you give it a spin again. Just remember to put it fullscreen, use "e" toggle to switch between #D aim and interact mode.

System Shock 2 is more scary. You will learn to hate chimps screaming or the sound of turrets activating. The many are disturbing and their talk while searching for you can get under your skin.
Similar to the treatment of enemies on Bioshock this are but victims of a parasite infestation.

There's also Ghosts apparitions so if you are scared of ghost.. well this are the type reliving their final moments..
Let's not talk of MidWives.. *(http://www.sshock2.com/ss2mmdb/artwork/midwife.html)

Overall I recommend you try 1 since is less scary..