1) Many people will not answer c4 with e5. Nf6 is even more common but also c5 and e6 are very popular. Because of the many possible replies and many possible transpositions the English opening is one of the most difficult openings to play. When playing c4 you can expect anything from hedgehog to catalan to kingsindian.
2) The extra tempo does not work in whites favor. The setup you posted is almost equality for black.
I play the sicilian kan as black but I dont know what to play as white. Im thinking about playing 1.c4 and then trying to play the sicilian kan as white. Is the extra tempo useful for white or would it be better to play a different variation of the sicilian reversed like the dragon or najdorf?