hello, I am struggling with some data I have,

>24 participants (PP)
>each tested on 3 conditions (let's call them: 1,2,3)
>each condition consists of 22 items

so in total there are 66 observations from 24 PP.
I'd like to test signficance within each subject and between the subjects.
how'd I go about doing this? (I use Rstudio)