double newbie question :-)

Dear OpenCL users:

I’m an openSuSE Linux user… I am learning Fortran (gfortran; already know Python, Basic, Pascal) and wanted to try OpenCL in order to speed up a couple of matrix diagonalization calculations. I have an NVIDIA 750 GPU, so I think it’s pretty straightforward to start messing with OpenCL, and I thought it might be an incentive to write more Fortran. I wonder if anyone had guidance - books, example code links, etc.

Thank You Very Much!