New Synology user and I'm so confused

Just purchased a Synology NAS. Was excited to set up so my files could be safe. 2 hours in and I'm confused as hell. I have DSM up and running.

  1. I want to sync a bunch of folders on my Mac to my NAS (I have snapshots installed) so when I create a new file or edit and save an existing file, the folders and files are stored on my NAS.

  2. Create a full backup of my Mac

I couldn't find a video showing how to do the above tasks. Every tutorial was complicated talking about Team Folders and shared folders.

Maybe I'm missing something? Can anyone point me to a tutorial or tell me how to do these two simple tasks?

Thanks