Am i ready for the nether? Minecraft?

I'm wondering if I'm ready to go through the nether. Or if I need more. My goal is to get a blaze rod and Scotland and nether wart. I have a golden apple, 2 stacks of iron, 7 diamonds plus a diamond pickaxe, half a stack of food. The portal has already been crafted. I'm wondering what should I do to prepare for the nether.

Yes. You might want some water buckets and cobble stone. (Ghasts can't blow up cobble stone)