That's about it.
Easter is from the Germanic word for "sunrise". That a lot of the religious background is similar to what's seen in other pagan religions stands to reason. The nearness in pronunciation is an accident.
It pays to note that there are also some rather big differences between the pagan rites taken over as Easter and the pagan rights with Astarte or Ishtar. Just as there are some rather big differences between "Easter" (and how it was pronounced 1500 years ago) and "Ishtar." We see similarities when we want to show similarity; we see differences when we want to show difference.
A lot of the information found on the Internet goes back before the Internet. A lot of people forget this. In this case, I'm going to guess a significant source of a lot of this drivel is Hislop's _The Two Babylons_, who cites some even older sources. Hislop's work dates back to the 1850s. That would be the 1800s.
And, yes, Hislop often either gets his sources wrong, his sources were wrong, or Hislop has no idea how to handle the then relatively new discipline of historical linguistics. Much like many pop culture folk have no idea nowadays how to handle modern conceptions of quantum mechanics or genetics, but given a preset goal always find a way of making the newish fields say exactly what they want them to say.