Welcome. So many variables. Five pictures in one person's living room might be too many but not enough in the next person's living room. It depends on the size of each wall space, size of room, how much furniture you have in the room, what kind of furniture, how tall it is, what kind of focal points you have in the room, how many pictures, what size each one is, windows, doors, etc. etc.

Without more information or a visual, I guess you could approach it like the popular advice women's accessories: "Put on what you want, and then take one piece off before you go out."

Best wishes.

Check out the search results in this link, you'll be inspired!
I clicked on "Photos", then entered "art arrangement" to get these results. You can search thousands of combinations on Houzz, and will be greatly inspired, I am sure!
Welcome to Houzz!!

https://www.houzz.com/photos/art-arrangement-phbr0lbl-bl~l_4959

Thanks, posting pictures later in the week. Please check back.