Obviously there are those with vastly more brisket experience than I on this board, but when I was starting out, I had the same problem. I approached it by smoking without separating the flat and point, until I had an internal temp of only about 140, and then foiling tightly and cooking until it was probe tender. It didn’t do a lot for the bark, but foiling before the fat began to seriously render and the grain began to loosen and release the injectate let me retain a lot more in the way of juice, and lent a lot more leeway with learning how to cook a $50 piece of meat without drying it out.