Bitcoin cash and bitcoin site

Hi i'm new in this platform! A friend of mine told me that its a good site for gaining information about bitcoin and bitcoin cash! I'm now using some mining sites and faucets! They are totally free! Some of these sites are not actually free! They told me to diposit here, even i couldn't withdraw any btc or bch from these sites because i didn't diposit there!so my question is are they really trusted? Should i diposit there? But some sites are actually free and i have done so many withdraw from those sites! P.s. i'm not so good at English, forgive me for my bad Grammer