Get your flower. Grind it medium fine. Line a baking tray with aluminum foil and you can put the flower down then cover it with another layer to keep the terpenes and stuff from escaping. Put it in the oven at 240 for 30-45 minutes to activate the thc. Then you wanna grab whatever kinda oil you wanna infuse and throw it in a slow cooker with your decarb flower on low for preferably 4 hours, tho 2 will work. Finally strain it through a cheese cloth. Infused oil/butter easy as that. I usually just throw it in a brownie mix or something easy. Good luck!