Posting pics is easy once you learn-
#1 -- you have to have a host that allows hotlinking - I use Homestead but that is no longer free -- there are several good ones out there that are easy to use.
#2 Make a cheat sheet -- I have a Note Tab Lite with the basic img code and I just paste in the url. That way I don't miss something and get the dreaded red x.
And if it is one I use a lot I have it at the ready to just insert into my post.
#3-- ALWYAS PREVIEW....or I might post this....
;-`)