Have not rooted in awhile need some help please

Last time i ever rooted a galaxy phone it was a galaxy s3. I upgraded to a galaxy note 3 awhile after and there was no good root out there, so i decided to wait and its been about 2 years now. I see plenty of info and roots just searching but id rather be safe than sorry. So i have an Unlocked At&t Samsung Galaxy Note 3 (I use cricket as service provider), SAMSUNG-SM-N900A, 5.0 Lolipop, Kernel v 3.4.0-4335446, KNOX 2.3. Can anyone point me into the right direction to all the stuff i need to do this as not to mess up so i dont just go doing it myself and f-ing everything up because whatever i read is from along time ago and not current as id like or anything? Id rather not have to do any downgrading or anything else id rather just be able to download needed files, plug-in, run software, root device and abrakadabra if possible. Thanks everyone!

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