pls help

You could try freesound.org. Make sure to check licenses of individual sounds!

I use a website called zapsplat.com.  They have a whole variety of fun free sound effects, including stuff for games.  Most of them just ask that you credit them somewhere (like, 'sound effects from zapsplat.com' or something), but do double-check the licenses on each sound byte to be sure.

Good luck!

Yeah FreeSound is great and there are graphics and sounds on Open Game Art:

https://opengameart.org/content/library-of-game-sounds

In the future, if you are getting more into it and  want LOTS of sounds/music, SoundRangers has ones you can buy.

If your game is realistic, you can make it with your phone and your voice!

If it isn't, then you could use a sound/music editor that has built-in instruments. (Pico-8 has one for more complex sounds, and can export WAV files.) Here are a bunch of free ones:

https://www.techradar.com/news/the-best-free-audio-editor

Good luck!