First: You do not need stats. But they might help you. But don´t get confused by hundreds of colourful numbers.
What you try to do in poker is making the most profitable decisions based on all information available.
The basics are your cards (obviously) and the betting action. Playing correct according to those is the first thing to master and already highly profitable on the stakes you named.
Any further information is welcome as long as it helps your decision making process, whether it´s stats, timing tells, notes (!!most important the higher you get) or screenname/avatar/chat.
As I have recognized, more information does not always lead to better decisions. Especially unexperienced players tend to confuse themselves.
I would recommend you to start out with some very basic stats that might help a lot even with a smaller samplesize like VPiP, PFR and WTS.
When you feel comfortable with those you might add some others you find helpful like AF, ATS, FBBtS.
Most importent is that you really find the stats you have available helpful not burdening.
And you should really make sure you understood what the individual numbers are meaning and how reliable they are based on the samplesize.
On the micro and low stakes you do not have many regulars you play against often enough to get a relevant samplesize. And the higher you get the more individual you treat your opponents and vice versa (!). Even if you have like 10k hands does not mean they are playing that style today. Taking notes and observing the table flow gets more and more important.
I myself recognized I stopped looking at stats almost completely on 20/40+. And I am a winning player, so stats are not a "must" although I´d recommend to use them as long as they appear to be helpful.
Though if you do not find them helpful on 2/4 - 5/10 you should reconsider your approach 
(I apologize for any linguistic and orthographical deficiencies - blame the german school system :P)
