The only thing really worth watching in TNG season 1 is the opener, "Encounter at Farpoint". No, make that 'required viewing' for the way it bookends the series finale "All Good Things", which is one of TNG's best episodes.
Here's the thing about Voyager: it has some excellent episodes, but also some of the worst in the franchise. If I were starting cold with VOY, I'd watch the first few eipsodes to get a handle on the characters and premise, then read a few 'top 10/best of' lists and run through those.