If it does not sew/move, then be aware that FWs are very easily thread jammed, and sometimes just a tiny piece of thread in the bobbin area can make it not budge at all.
FW needles go opposite to what you might think; needle flat on left, thread Right To Left.
I got my FW very cheaply because the lady said it needed servicing. I did not know any better and I was keen to take a chance on buying a fixer-upper. When I got it home and started tinkering, it turned out that the needle had merely been in backwards and there was a wee thread jam.
Good luck Marta, and please keep us posted! Oh, and I added a p.s. to my last message after I posted it. :-)