My first question would be to ask if you already have a recipe you like? If you do, why would it not work? I too am not used to sheetcakes, but because of charity work, I have had to learn. So far my recipes have worked. Scratch only for me too. I got help on CC and this is what I learned:
Cut the temp down by about 25 degrees, or the equivalent.
Use baking strips and parchment.
I use two flower nails.
I did have some trouble getting my red velvet to cooperate but I think that is because it is a more liquid batter, and I was making a taller cake than I did in the smaller pans.
So if you do have great recipes, I think you would be happier trying to adapt them. If not, I will be happy to share. You can pm me or I will probably see the post.