At the top of this forum page there is a black tab 'Documentation'.
It will take you to a long list of subjects. You need to read about Canvas and also Bitmaps.
That should get you started.
Also try the search button on the right of the forum page and search for those items.
After that perhaps you will have a specific need which may be answered more precisely.
DO not search for canvas because the tutorial is super advanced talking about making a compass. instead, read the beginner's guide on layouts. You can put things on layout like pictures and stuff.