is c4 better attaking starting move than e4 ??

No but under 1800 it is played under 9% so opponents are less studied on it. But you need to be solid at positional chess and varying pawn structures. You will take some losses zigging instead of zagging or keeping the tension. If you like aggressive check out:: Jobava London, Colle, Torre or Trompowsky, Nimzo-Larsen, Bishop's opening can transpose to Evan's gambit and King's Gambit lines. Urusov gambit. Depending on what level of chaos you want try Jobava first. If you want safer try Colle or Nimzo Larsen.