Guidance required topic

Hey guys, iv never rooted my htc one before...iv got the original single sim m7 801e.

Right now, i have 6.13.707.106.

I wanna install the [5.0.2] Lollipop | Unofficial CM12 | HTC One M7 | Android 5.0.2 [12-23-14] rom.

Too many guides, so im confused. Which is the latest & preferred way to unlock n root my phone ?

Also, is there a way to root without using a PC ???