Hello,
Long time browser first time poster here.

I have a 75-80 Peugeot I have no idea what the model is. The shifters and derailleurs are simplex, the shifters are mounted on the stem. Maybe that helps.

My questions is this.

I want to get smaller chain rings or just get a smaller inside chain ring if that's possible. my problem is I have no idea what will work or not. Ive read on Sheldonbrowns website and other places online and I just find myself confused.
I have a newer 6 speed cassette and currently old 52t and 42t front chain rings.

My reason for wanting smaller chain rings is that I have a lot of hills in my area and it would be nice to not have to totally grind it out every time I ride. I do love hitting the hills but it gets to be a bit much.
Oh also its friction shifting, but I am sure you vintage geniuses already guessed that.

Thanks!!