Use the Hedgehog. I play it frequently OTB and online and it gives pretty good results. Very solid yet dynamic. Sharp tactical vision and decent evaluation skills are a must though.
What would be a simple way to deal, as Black, against the English Opening?

Usually I play the Benoni or Benko against d4.I am thinking about studying the Dutch to play against d4 and c4 but it is a little tricky
Hmm.
The Dutch, if you choose to specialize, would probably offer a more compact repertoire. Although there are independent Anglo-Dutch lines, against better players both d4 and c4 will probably tend to transpose into the mainlines.
Not much carryover from Benko or Benoni, I wouldn't think. The symmetrical lines in the English would be superficially similar, and would let you get into a playable middlegame easily enough most of the time, but the play would be very different.
Have you thought about looking at Tal's games and perusing his ideas against the English? He was, of course, THE Benoni player, and I think he favored 1...e5 lines against the English. I know I've gone over games where he played e5, d6, f5 stuff. Which I think usually leads to reversed Closed Sicilian positions. Might not be a bad place to start looking.
And it doesn't get much more enjoyable than spending your study time poring over tomes full of Tal. :)

Offcourse, Tal is great and you are gentle about using your time here.My only point is that, as a d4 player, I usually don't play against the sicilian, so I don't want to play a reversed one.
And I like openings that have less aount of time to study because I don't have a lot of time

If you like the QGD, you can play e6 and d5 and give them the option of transposing into the QG (which many English players are trying to avoid) or giving you a nice equality with no particular problems.
One other route is to play what looks like a reversed Closed Sicilian with e5, Nc6, d6, g6 etc...

I play the Dutch heavily against d4 and c4 as well as Nf3. Against c4 I've found structures with Black pawns on g6, f5, d5 to give interesting games, and it has the advantage that White players (especially c4 or Nf3 players) won't be familiar with the positions that result.

I find the leningrad dutch to be my savior against 1.c4
For months I was playing 1..e5 and I was struggling, but I decided to play 1...f5 in one go against 1.c4 and my results have been....good. I love playing fighting chess.
Of course, I play the classical/stonewall more often so I had to learn the leningrad completely since I didn't know much.
Almost any natural move against 1.c4 is okay.
Offcourse, Tal is great and you are gentle about using your time here.My only point is that, as a d4 player, I usually don't play against the sicilian, so I don't want to play a reversed one.
And I like openings that have less aount of time to study because I don't have a lot of time
If time and efficiency are super-essential to you, I'd either go with the symmetrical, knowing that (A) it's one of those openings where middle game play is more important than opening theory, and (B) that your regular Benoni repertoire would suffice if white tried to get fancy and transpose with an early d4...
...or I'd switch my d4 approach to something more c4-friendly.
If you're keen to try the Dutch, go for it. It's a fun defense against all kinds of openings.
(Unless you play the Kan or something against e4. In which case Hedgehogging could be a valid option for efficiency's sake.)

The idea about the symmetrical is very good.Less risks and easier to understand.The Hedgehod I want in the future to help me train my tactics but not now.Thank you sir.
I am around 1650 with a proportional knowledge about how to counter e4 and d4.But strated to see the c4 more often.What line(s) should I study against this, with black?Dutch Defense, the usual lines used agaist d4 or another?