Default Problem Setting Up TWRP

Hello, new rooted user here, just done rooting my nexus 5 using towelroot after which I used bootunlocker to unlock the bootloader automatically so that I wouldn't lose any data and so far so good. Now I'm trying to get TWRP on my phone, I used the TWRP Manager to try and install TWRP but when I press install a pop up comes up saying downloading recover but it is stuck at 0% so I downloaded the .img file manually and pointed the manager to it and when I tap on it to select it nothing happens. I read that I should try the KK SDCard fix then re-attempt installing TWRP but it still is stuck at 0% when downloading, what do I do? Help is greatly appreciated