Home Alarm advice

I apologise if this is not the correct place for this thread, but I couldn’t find a better alternative. I am completely new to Home Assistant and would really appreciate some guidance?

I have been looking at the various Home Alarm projects and they all look good, but I am not clear on which one to start with.

I want to use Home Assistant to install a home alarm system with wired sensors and a wired keypad which I can arm / disarm remotely and also receive status updates on my phone when any kind of activity is detected by the alarm.

Can anyone suggest which Home Assistant projects interface to a hard wired keypad as well as an app keypad?

Thank you.