Security Cameras
A security camera can now be installed internally and externally very affordably
Camera Door Bell
There a wide range of front-door monitors available
External Cameras endure a 360 view of your house
Consider installing it on your back garden wall look back at your house/entrance
Outdoor cameras
https://www.amazon.co.uk/stores/BlinkforHome/page/380C81D6-2CD2-4737-9F42-0E40A18AF567?ref_=ast_bln
Securing a Room:
The Door jammer device is a great way to secure a room at home or when travelling
https://www.amazon.co.uk/
Always make sure to keep your phone charged. It may also be helpful to have a spare or old phone in your room that is always available. Remember you do not need full active credit to call. the police.
Fully Charge Security Mobile Phone
Consider keeping a fully charged mobile phone one in you bedroom which can be used to call the police in case of emergeny