Thanks a lot! I changed load-tinydisplay to load-p3tinydisplay and now i can finally get that hello world program to run!!! And I installed libgl-mesa-dev and tried to makepanda again and it does not say “gl” is missing. 
I thought opengl was just ‘there’ in every system (I used to use windows for an awfully long time) and it never occured to me that I’ll need specific dev packages to use it. Thanks again.