starting to masturbate again

I used to masturbate quite often and I really liked pleasing myself but even since we moved to a smaller house and back with my dad (he was abroad) I just feel like the walls are so thin and anyone could walk in at any time (literally the one bathroom of my house is on the other side of my room and I can hear when someone even turns on the switch)

how do I get myself in the zone?

also I don't have any toys because I'm 16 and I wouldn't know where to hide them