At my age the main problem is that I read a lot in a computer screen and my eyes get tired. Recently I read in the last weak several books for learning Erlang and Elixir and one for refreshing ruby. Last month I learned java by doing several projects with netbeans. Initially I programmwd only with gedit and googling stack overflow. I was programming feom six pm to five am to help my son with a java project. Honestly helping him is not doing any good but not helping is not any better. Were my eyes and health stronger I think I could learng anything in little time. I learned the hard way failing one and again. You couldn't believe that I stumpled with all the walls before continuing along, bit what don't kill you make you stronger. Get ready for the next battle, we will win.