Airsoft gun and some BBs?

So yes like another previous question i am yes, a starter so i need a few tips on these items i am going to buy. I do have some experience though. I go to my friend's house ho has a sniper, 2 shotguns, and a machine gun. I love the shotgun and yesi am planning on buying one. tThese are the BBs i am going to buy G&G 0.20g (White) 5000bbs for 11. 50 at airsoft gi and here is the gun Gold Arrows Spring Shotgun Airsoft Gun ( Retractable Stock ) it comes with a speed loader, strap and soem shells and shell holder ( i saw on reviews that the holder sucks ) so tell me what u think i love this shot gun and i where gles so that takes care of the facemask, eye protection. I play with no armor and no head shots so im ok :D