They are still bows and you shoot them like any bow. Best advice is to not pay attention to those who tell you that you must grip a longbow, or use some bent over style, etc. I shoot mine just as I shoot my recurves. I love all kinds of bows, and I like shooting the different types. Matter of fact, you can shoot both types in the same shooting session with little trouble.
I have a home made longbow, straight limb model, as well as a def/ref design, and three recurves. They are all good and I can go from one to the other with relative ease. By the way, some of the modern longbows (3pc) are really no different than recurves of that design, so there isn’t much of a learning curve there. Otherwise, you just need to adjust to the small riser of a traditional style longbow.