Is there any other episodes of Naruto after Episode 220 before Naruto Shippuden Episode 1? I watched all Naruto episodes on Netflix. I want to know if episode 220 leads right into Naruto Shippuden. I only watched a few minutes of episode 1 in Shippuden, but just watching it, I feel like I'm missing more episodes that lead into Shippuden.

Is there anymore Naruto episodes after Episode 220? Like, do they show Pervy Sage actually training Naruto or does his path of training leads into Shippuden?
No, you haven't missed any episodes. There is a time skip between the end of Naruto and the beginning of Shippuden, where Naruto goes off and trains with Jiraiya and the other characters do various other things as well, some of which are shown in flashbacks but most are just referred to.