I would recommend upgrading to a better radio. Even a used older model analog-only Uniden, Radioshack or GRE would probably be less frustrating to use than what you're using now. Uniden models seem to have more programming software options available from my experience.
If you want to dabble in digital you could try a cheap SDR. RTL-SDR models are about 30 bucks and using free software you can pick up P25 and trunking systems (I believe you'll need 2 SDRs running side by side for trunking? I've never tried it). I'm not sure if the software will run on W7 though. I picked up a retired Dell micro computer with Windows 11 installed for $55 a couple years ago. There's ways to do it on the cheap
If you want to dabble in digital you could try a cheap SDR. RTL-SDR models are about 30 bucks and using free software you can pick up P25 and trunking systems (I believe you'll need 2 SDRs running side by side for trunking? I've never tried it). I'm not sure if the software will run on W7 though. I picked up a retired Dell micro computer with Windows 11 installed for $55 a couple years ago. There's ways to do it on the cheap