not so good the first opening page

hallo, I dont know who is reading this and if this is the right place 
for my wish. please excuse me, I dont know much about computer with my 
70 years.

if I open the "frontpage" there is at the left side the possibility to 
open a new textdoc or calc ...
on the right side there are shown all the docs, that I usedopened in the 
last time. that is very bad, because everybody, that stands near is 
informed. I wish me a bottom to stop this - so there is nothing from my 
before used docs to be seen.
thank you, thomas w.