The main daysailer site under technicals has some rigging guides.
http://www.daysailer.org/ManualsThe top of your mast will have a masthead with sheaves in it to control the main sail halyard. The jib halysrd will run up to a block on the front of the mast near the front stay. Both halyards if external to the mast will run down the mast and through deck or cheek blocks at the base of the mast, and back to cleats. You described having a line fixed at the top of the mast and attached to the Boom. That would be a topping lift that you would disconnect from the boom before you raise the main sail. Or it's possible the top lift comes down to a block and then forward on the boom and cleated, so it can be left on the boom but eased so your boom can properly swing when sailing. The Mainsail will have a bolt rope or lugs that slide in the track on the rear of the mast - just feed the sail rope or lugs in as you pull up the halyard bit by bit.
Greenlake covered the rest.
If you still aren't sure how to raise the sail, try this link. It's how to raise the sail on a Rhodes 19 which has a similar system. I could not find a video for the daysailer. Obviously her halyards were already rigged.
https://m.youtube.com/watch?v=Qqi5cIR3izkI'm not sure where you're located but if you have other sailboats on the lake you are sailing on, see if there's a sailing club there. You can find experienced sailors to help you out. Good luck.