The ticking could be timing components. Mine is doing the same. Ticks at start up then goes away. Then when warm it is there around 2000-3000 while driving.
Mine did the same thing it never affected the engine performance at all.
I never could tell or figure out what it was.
I consider a tick to be comparable to an exhaust leak. This sounded like a socket that fell on a valve cover from 3 feet...over and over and over