Question about xposed installer help pls

Okay i have galaxy s4 and I updated it to lollipop 5.01 stock rom which is touchwiz right?

Okay can i install xposed installer on s4 5.01 lollipop stock rom and is it the official version of xposed or unofficial? And give me the link and help me pls



I always wanted to have lollipop but i just can't install xposed :(

Thanks everyone