You've got great texture on the wall. Sounds like you like the cottage look - me too! Some suggest a large painting flanked by sconces. That would look good. But I think that the cottage look might be maintained better with smaller things.
There's a couple magazines that might be worth picking up to get some ideas of what you really like. There's one about Flea Markets and others about Cottage looks. If that's the look you're wanting to create, look for inspiration there. A lot of the people here like modern, transitional and contemporary homes and are giving you ideas that fit that look. I don't think you're wanting that look.
Also, what do you like in colors? I love lots of white with pops of bright colors. Didn't realize that til someone else told me that's what I was showing her at a time when I was trying to figure out wall colors. So I also started tearing out photo's of homes/rooms I liked, then when I went through them I could see she was right. Don't turn your cute cottage into a contemporary masterpiece - it will cost you a lot of money, and won't hit the mark of what you were wanting...
https://www.bhg.com/decorating/decorating-style/cottage/
Just a thought to ponder... Some cottage looks can be very busy/cluttered, others more sparse. Another thing to ponder while figuring the final wall look...
Q
Great link to design
Q