what is the best tab type/website for turning into CDLC? does it matter? also im sorry if this has already answered somewhere, i couldnt find it. thank you!

You can skim through this tutorial here :

It should give you the rough idea but I have TLDR version as well:
Would be a tab you bought from actual professional who's doing accurate tabs in gp5\gpx\gp format which is Guitar Pro format that should be possible to sync\import easily into eof\rocksmith.