Can I root and install custom rom?

I have a SM-900V from Verizon and am wondering if:

1. I can root it


2. I can install a custom rom, and if so, some ideas on good roms

If the answer to 1 or 2 is yes, please post instructions or links as I have never rooted or installed a custom rom. I am running Android 5.0 and am tired of the bloatware and inability to use external sd card. I keep running out of space on my internal ~10GB storage.

Thanks.