Yes, evetyone is correct: I first started skyrim through its launcher, it asked me to sign in to bethesda account, I didn`t had one, so I get out, made the account, forgot to go back into the game, but started installing SkyrimSE v2.0.0 and when launching the game through MO, logged into bethesda into the main menu all downloads started but went into overwrite folder.
Maybe the guide should promt more clearer that ALL CC contend should be downloaded right in the begining and maybe list the necesary content at the begining of STEP 3 (where CC plugins entry is, but with detailed entries for every mod)
Thank you all for help!