An easy repertoire for me was:
1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 and pick a position you want to play like 4.d4, 4.Bb5, 4.g3 or even 4.a3.
1.e4 c5 2.Nf3 d6 3.d4 cd 4.Qxd4, 1.e4 c5 2.Nf3 e6 3.d3 (King's Indian Attack) and 1.e4 c5 2.Nf3 Nc6 3.Bb5 but it's hard to find simple moves after 2...Nc6... You might try 3.Nc3 Nf6 4.e5 but this is very tactical...
1.e4 e6 2.d4 d5 3.ed ed 4.c4 and 1.e4 c6 2.d4 d5 3.ed cd c4 where you just play an isolated pawn game instead of having to learn a lot of theory. GM Norman Miezes is a good player to look at because he has played this a lot.
In all the other openings I just played natural moves and did fine. In those other openings Black has to play weird moves to justify himself (imo) and White can usually just play natural moves and get a good game for himself without knowing much theory. For example 1.e4 Nc6 2.Nf3 is just natural and Black can either play 2...e5 which is normal or some other move that just makes him work harder than you have to. But that's just my opinion on things.
I find all this stuff with just google and an online database. Some helpful stuff...
http://www.kenilworthchessclub.org/games/java/2009/fr-ex-c4.htm
http://www.kenilworthchessclub.org/articles/opening/isolani/isolani-best-A.htm

Im a 2000 player that have d4 as my main weapon and i haven't played e4 since I was like a 1200 player 3 years ago. Now I want to extend my opening repetorie and give myself a challenge by learning e4 so I can play it at my level with decent result. However I don't consider myself as a tactical player and I would really want to avoid the opening sicilian. Do you guys have any recommendations on a calm repetoar with e4 and maybe some tips on good books. These books should give a good introduction on e4, I don't want any deep theory. Thanks on forehand for answers!