Best and easiest way to fix this?

There is this one annoying hole in my wall which is quite small...maybe about 1x1 or so. I think of a good way to fix this and stuff I found on Google seemed a bit too much work and a little complicated (i am not really good at this kinda stuff).

I had an idea just using spray foam and then paint over it ?

Would that work or do you have better ideas?

#AskLemon8