new digital antenna ... proper procedure for scanning?

I literally "cut the cord" last week. Bought a Digital Antenna at Wally World..
I plugged into my TV , found the menu option for scanning ... and it picked up quite a number of channels.

Then I tried the same thing with my Tivo.. it only finds 2 channels, and they're terrible...

Is there a tutorial somewhere for dummies that steps through how to do this?
I miss being able to record stuff. I'm sure there's some option I'm missing somewhere.

Thanks in advance for any help,

Pat