Looking at the cipher string JFJAM{j@3$@y_j!wo3y} we can see that the format is familiar, the flags generally start with CYCTF so this looks like a simple Ceser Cipher.
We can eneter the string into CyberChef and use a ROT13 recipe, varying the shift value until we find the correct flag string;
https://gchq.github.io/CyberChef/#recipe=ROT13(true,true,19)&input=SkZKQU17akAzJEB5X2ohd28zeX0
And there we have our flag;