This was my first movie of Harry Potter and that also on theater.
I do not know what to say! Our generation stepped into teenage/youth watching Harry Potter movies and it was the first time you watched it!!!
Harry Potter is the kind of timeless literary achievement that comes around once in a lifetime (not my line).
Buddy, no offence meant to you, but do you even know what Harry Potter is really about? Yeah I am really being serious on this. It is not just some magician's story, it is wayyyyy more than that.
I suppose (please correct me if I am wrong) you haven't read any of those novels too. Please take some time to read this page:
Harry Potter universe - Wikipedia, the free encyclopedia
(and if you have ample time, do go through all the connected links/pages).
And about its being boring, this penultimate part of the series is actually the silence before the storm! I implore you to watch all the 6 previous parts and then watch the Deathly Hallows once again.