Where to look for info on Rooted S4 thats stuck on Sprint logo on start up

I have a S4 that was rooted and working fine. Had super User X Tools was all fine.When I attempted to change the Fonts today it all went to hell.When I was prompted to reboot phone rebooted to the Yellow sprint logo and just stays there. Went to system recovery and nothing. Phone wont connet to computers via usb to use odin.
Any ideas where to look next ?

Installing rooted ROM on a phone that's not rooted

Hello guys! I have Xperia T 9.2.A.0.295.
I've tried a couple of methods of rooting my phone and all failed:
- rooting via flashtool, when "make it ra1n" appears, phone just restarts
- rooting via first method listed in this subforum, when running .bat file it gets stuck @ *daemon started successfully*
- rootin via towelroot, when I try to install it, it simply says "App not installed".

My idea was following, but I'm afraid to execute it without you guys having my back or I know it will be broken :D (back or phone or both hehe)
I wanted to try to push CWM via fastboot (already got drivers installed and all options defined correctly, unknown sources, debugging etc.)
I wanted to follow this tutorial with this CWM: http://forum.xda-developers.com/show....php?t=1918966

1. So, if I install rooted ROM, is my phone going to be rooted or not? Or is installation going to fail? (some people were mentioning it's very likely phone is gonna end up bricked...)
2. If I install this CWM (since it's from 2012) am I going to have problems installing ROMs developed in 2015 (eg. 4.4.4 or 5.x?)
3. Is there a way I could back my current software up just in case something goes wrong so I could restore it in case of a fail?

Thanks guys!
If anyone has FB and maybe would like to add me just so I could contact him if things go south, feel free to send it to my PM, I'll add you :)