Can any bakers (anybody) help me with this cake idea!-sheetcake!?

i would like to do a 2-layer sheetcake with possibly a strawberry filling. i really need an Amazing WHITE cake recipe "and" directions on how to do a white layerwed sheet cake! its for my parents 25th aniversary -long story short, my sister-in-law's being a total jerk about it almost because im going to baking and pastry school in a couple months and she is almost trying to put pressure on me saying i should do all this other crap and trying to make me nervouse and sorry its just really upsetting me:( anyway could anyone please PLEASE help me with this? i would just love to do an awesome white sheetcake with 2 layers if any of you have some great recipes! (i really want to show her up so she knows i can do this on MY OWN! thank you so much! also-if anyone knows any great fillings to go between the two layers could you help me out? im thinking buttercream frosting because my mom isnt a fan of the fondent-just wondering if thats a good combo also. thanks. i mean jeeze, im going to baking school to LEARN this stuff. my sister in law seem to think i should know everything already. ugh