I'm also doing fungi DNA. There's a simple method you can try. What you need to prepare is just 1x Tris-EDTA (TE) buffer. Pick small amount of fungi culture using sterile bambo stcik/toothpick, transfer into 96-well plate contain 100ul 1x TE buffer. then incubate at -80C for overnight. then after overnight, take out the well and thaw at room temperature. Heat shock the well at 60C and shake for 1min. You can prepare the PCR mixture earlier. Aliquot 28ul of PCR mixture + 2ul of crude DNA into PCR tube, then PCR, electrophoresis and visual.