Trouble getting SCNvim to work

Hey guys - didn’t have a chance until now to try getting everything to really work. I spent some time yesterday setting up my init.vim and it basically looks like the one on github and :checkhealth seems very happy.

Running init.vim gives the following errors:

Error detected while processing /home/jordan/.config/nvim/init.vim:
line   46:
E117: Unknown function: plug#begin
line   47:
E492: Not an editor command: Plug 'davidgranstrom/scnvim'
line   48:
E492: Not an editor command: Plug 'SirVer/ultisnips'
line   49:
E117: Unknown function: plug#end
Press ENTER or type command to continue

When I try to run :SCNvimStart I get the error that it’s not an editor command. So at this point I’m a bit unsure how to continue.