Open it with a Notepad,or similar application.

I meant where can I find it to edit it?

Sorry. In BG main folder, where you installed the game.

I don't see the file o.o and I'm in the folder where the game and such is located after I installed it

In Windows explorer in top left corner, click Organize->Folder and search options
Under 'View' tab -> Advanced settings, uncheck 'Hide extension for known filetypes' and 'hide protected system files', check 'show hidden files'.
Apply and Apply to Folders.

I've decided I'm dumb. v.v

Meaning the file is there or still isn't?

And no, you're not ;)

I can't find it. Could not find that Organize folders thing either. Windows Explorer would be Internet Explorer right?

No, Window explorer is what you browse your folders with.

Alternatively, go to Menu Start and in 'Search program and files' box, type 'folder'. You should see Folder Options at the top and access it that way too.

Did all you said about hidden files and it doesn't show anything.

That would be strange.
Ok, go to Folder Options once again.
This time, under 'Search' tab, check 'include sub folders' and ' include system directories'
Apply, then Ok.

Go to 'My Computer', hit F3.
search for 'baldur.ini'

Found it that way!

Brute force always wins :P
Out of curiosity, where was it?

In the Gog Folder

You could also download Gatekeeper for BG1(http://www.mud-master.com/gatekeeper/)
and shadowkeeper for BG2(http://www.mud-master.com/shadowkeeper/)

With this, you can edit your savegames and the characters therein. Stats of characters, inventory etc. can be edited with this program. This way you may only get killed by demiliches or Demigorgon, but I guess you're still in BG1, so no worries :P