Is this a good watercooling part for beginner

I'm guessing you have these parts already?

not yet, but is it good enough for beginners

Well, I wouldn't get any of those parts. The processor you picked is over a year old, and the video card is much too slow. The power supply is also very very expensive.

I also know pretty much nothing about watercooling, but its not something I would recommend for a beginner anyway.

then can you recommend me a pc for $2000

For gaming?

Might want to fill out this form.
http://www.tomshardware.com/forum/353572-31-build-upgra...

Also if your after water-cooling advice, then drop into the water-cooling forum. This board is primarily for those looking for whole system advice, not more particular stuff like that.
Though it seems like you'v made good choices with the W/C components. The rad is good and the fans you picked are quite popular for radiators.
If its your first time watercooling, consider getting a kit like an XSPC Raystorm RX360, much simpler.

thanks man, I appreciate it

After I read I got confused like Crazy. Anyway I will try to do it