Do you need a new brake lever? I've never felt any difference after changing break levers except for size, width, length, and angle. I wouldn't buy it if you're a beginner, invest in better parts.
Fox 831 is a great for for dirt jumping. I rode my buddy's bike that has Fox 831's and they were excellent. I was riding slopestyle but I bet they're good for dirt jumping.
I don't live there but I go there every summer to see family. My uncle works at a bike shop (wheelsport) and has a mountain bike trail and jumps near his house.