I think you are suggesting that you've got Adams county working which would mean you have an understanding of trunking and talkgroups. If not then you'll want to do some reading about trunking, motorola systems and APCO P25 settings. (You're not trying to listen to Pueblo while sitting in Westminster are you? That mostly won't work.)
For Pueblo you would put in the control channels and talkgroups for towers and agencies near Pueblo.
The map that shows you what towers are in what location is at the top of this page:
Scanner Frequencies: State of Colorado DTRS Trunking System, Statewide, Multi-State
Further down are the frequencies to match the tower numbers you want. (though the map's numbering scheme and the tabular listing number scheme don't yet match with recent re-numbering schemes)
I'd pick Walking Stick, Jackson Hill, and Goat Hill sites to start with. Control channels only.
And under Pueblo on that same page would be the talkgroups for the agencies that are on DTRS.
If an agency you want to listen to isn't on DTRS then look for it under the County listing here:
Pueblo County, Colorado (CO) Scanner Frequencies and Radio Frequency Reference
If you aren't programming your radio using computer and software most folks would strongly recommend you gain that capability. Doing these radios manually can be done but manual is a lot easier after you've used software and the concepts have been absorbed. Doing it manually is like trying to drive while looking thru the wrong end of a telescope.