acrylic on paper
acrylic on paper is totally fine! i don't gesso or coat my paper with medium as it seems unnecessary. acrylic is nondestructive and can be applied directly to almost any clean surface. it's not wrong to gesso first, you just don't have to.
i tend to paint more thinly on heavy printmaking paper or matte board. i just pin it to the wall and buckling is minimal. thinner paper will buckle but you can tape or glue it down like a watercolorist and when it dries buckling will be minmal the most solvent portion of acrylics in this context is the water!