Again, I completely agree with everything that Izzy and Ecignet have said.
I'm relatively new to all of this as well, but I've just started to try out some new kit, and some much better batteries as well. My new Innokin itaste MVP super battery arrived this morning and it's a great bit of kit. I also got some Ego 1100mAh twist variable voltage batteries as well, so far, also a significant improvement over the smaller manual 650mAh batteries.
I still use my CE5's, which I got as part of a starter kit, plus some extras as well, when out and about, the smaller CE5's with a 650mAh are just a little bit more discreet and fit well in pockets. I too got fed up with constantly filling and cleaning the CE5's however, but that's just me, and is due to my personal circumstances.
I'm now using the Kanger MT3's as my main system (very similar to Izzy's T3's, but they hold 3ml of liquid and they have a metal shell, not plastic), otherwise they work in exactly the same fashion as Izzy has already described :-) . Because the MT3's are of a slightly higher resistance as well, I got the uprated batteries, and the MT3's have gone from being very good to outstanding.
All the best, hope you find a setup you like soon :-) .