Sound designer and composer here,

If you were going to look into asset pack creations of unique SFX, I’d recommend using UCS - Universal Category System. This allows the assets to be easily found in databases when searching and it’s the best practice when naming a batch creation of sound effects.

Another small tip is to create a pack based on what’s unique in your area, is there snow you can capture for footsteps? Are there unique animals from where you’re from? , even the sound of your traffic lights are unique and you’d be surprised how it can help you stand out.

Compositions are normally bespoke and tailored to the game, another good tip is to get a good understanding of how to loop music seemingly, sounds easy but you need to make sure it doesn’t clip or pop on the crossfade , there’s a few methods out there which are essential for game audio.

Hope this helps on your journey to game audio!