If you use Pixir you don't have to pay causs I use it all the time!

Then try some free alternatives. Like:
Paint.net - http://www.getpaint.net/
GIMP - advanced one, can be bit confusing for new users - http://www.gimp.org/
Sumo Paint - runs entirely on your browser - http://www.sumopaint.com/home/
HeliosPaint - http://www.heliospaint.com/
Pixia - http://www.snapfiles.com/get/pixia.html
PhotoFiltre - http://photofiltre.free.fr/frames_en.htm

I never used those below Sumo, so for those I can not say how good they are. But in my opinion Paint.net is best one. Of course any of them will take some time till you get used to it and some learning curve. Just try different ones, if these do not work for you, try Googling for "Microsoft Paint alternatives", "MS Paint alternatives" or "Photoshop alternatives". You can also replace alternatives with "better than", like "better than Microsoft Paint". And check results for any other programs. But generally, more advanced it is, more learning and getting used to it needs. But give them some time, after using them for a while, they will not be confusing anymore. And they can be much more efficient than Paint.