They're called fillers OP. Most people skip them. There're, however, good fillers like the Kakashi ANBU filler arc. And the last episode of part 1 was canon.

Sasuke was pretty much the reason I watched part one, so...
I just skipped them.No one got time for that shit yo.
I did not know they were fillers at the time(I didn't even know what such thing existed).