For these kind of tutorials lynda.com is a great resource as you can choose a course aimed at your designated skill level.

Here is a good introduction course to GIMP: http://www.lynda.com/course-tutorials/GIMP-Essential-Training/112673-2.html

Scan through the course subjects on the left to ensure it covers the elements you need.

For these kind of tutorials lynda.com is a great resource as you can choose a course aimed at your designated skill level.

Here is a good introduction course to GIMP: http://www.lynda.com/course-tutorials/GIMP-Essential-Training/112673-2.html

Scan through the course subjects on the left to ensure it covers the elements you need.

Alternatively a free option is the online documentation: http://docs.gimp.org/2.8/en/ The list of topics here is quite comprehensive.