Hey all,
If (like me) you are a bit struggling with GIMP’s rather bizarre interface/feel - there are different free online alternatives. I found Pixlr Editor by Autodesk to be well suited for the job. It all works nicely through a web-interface.
There are also other alternatives like Sumo Paint, or you can get a whole list by searching “browser based photo editing” in Google. Just keep in mind that these are proprietary services as oppose to the open source GIMP. It is still free, but something to bear in mind.
I hope this helps!
Best