@Brian_Bunge Good to hear that you are doing better.
I use SmartThings SHM (see here for the difference between SHM and STHM and tips to work with STHM) as my home security system and the dashboards to arm/disarm the security. You may also be interested to add a siren, ex Aeotec siren, and create automation rules to trigger the siren when door/window is opened while the SHM/STHM is not disarmed. I have rules to trigger siren, notification and echo to speck specific texts when things happen in certain scenario, and I feel the siren does better job alerting, and echo helps to give some context about the situation.
You may also be interested to check out how to use PIN to secure the dashboard or specific tile, ex: SHM/STHM tile. So others cannot change the alarm status without PIN.