Lingala is the local language spoken in this region beyond French. Learning a bit goes a long way to befriending locals.
Plenty of cyber cafes exist, so don't worry about staying connected.
The Association Belgo-Congolais ABC rents out videos VHS and DVD.
Go for a walk/jog along the river in front of the British /German embassies.
Go to church on a Sunday morning like most of the locals do.