Would you recommend any mods for someone's first time playing the game.I don't mean like adventurers because I will do those after I beat the game at least once.But more like bugfixes,cosmetic upgrades and the like.

I recommend to try first without any mods...

Witcher 1 is probably the only game I play virtually unmodded.
I have two small mods (both by Corylea)
The first is a small but annoying bug fix
http://www.nexusmods.com/witcher/mods/32/?
The 2nd could be considered a cheat, but it just takes some of the tedium out of collecting herbs.
http://www.nexusmods.com/witcher/mods/31/?

So it doesn't need any mods well that's cool.I just was checking to see if they're any mods or unofficial patches that are considered essential since I don't want to use any cheats and mods that add content will be for after I beat the Orignal Content.

This is an old post but there are some mods actually for the first play. (Especially the graphic updates):
https://www.kirmiziperfect.com/installing-best-mods-for-the-witcher-1-guide/

So just curious, I started playing the witcher 1 yesterday. And a few mods installed on the first page from nexus mod manager including the faster run. And I got large frame rate drops? Like from 80 to as low as 40. I have a gtx 780m and i7 4700hq. Old hardware I know, but I figure I should be able to play the game at 1080p 60fps at max settings.