Looking for a home security system

Two prime functions of a home are shelter and security. We live in a home where we can do anything we need and want to do and feel safe whenever we are in it.

However, due to the increase of crime rates, it's hard to feel entirely secure and safe even within the bounds of our own homes, even with a home security.

Recently, I have been thinking of installing a Home Security Surveillance System at home. My folks are both old now, and I have no training whatsoever in self-defense. It's not being paranoid but being careful and doing precautionary measures to lessen if not avoid threats of attacks, burglary or accidents.

I've been looking for an easy-to-use and affordable home security system. I found Advanced Direct Security but it's only available in the US. I have to find a local one.