You will need a board which will slide inside the press. On this place your inked lino and lay your printing paper on top, plus a sheet of clean paper and then your press blanket, packing etc.
Slide the whole thing inside the press ready to take the print ensuring the central area of the print is in the centre of the press.
Now the press can be wound down using one finger to spin the handle whilst supporting the top platen with the other hand. BE CAREFUL TO KEEP YOUR FINGERS CLEAR OF THE OPENING.
Once the top board has reached the bottom board, you can then tighten up the press. This would probably be about another turn of the handle. You should not need to use excessive force to take a successful print.
Now wind up the press enough to slide out your board and have a look at your print.