Edible out of fresh harvest

Fermentation will definitely affect the effect of your weed, as the trichomes will keep on ripening and becoming more amber coloured. Over time, thc is being converted to cbd and cbg which increases the "stoned" effects on your body and makes it slighty less psychoactive. You can theoretically make edibles with fresh harvest if you want more of a psy high, but i think that you are going to have a grassy/chlorophyllic smell and taste in your edibles. What you could do is to make fresh frozen extract / bubble hash and use that.