This might shock some of the other members coming from me of all people, but at this point I would really recommend you get it running and drive it a while as-is before jumping into a lot of modifications.
Go through the brakes and steering to make sure they are in good condition, go through the
first start tech tip to make sure you don't damage the engine trying to start it, and just put some miles on it.
Get a feel for how it performs with the stock parts and decide from there what you are willing to trade for changes.
If you do want to lower it immediately, you can get lowering springs for a reasonable cost. The downside is that they reduce your suspension travel and you will likely bottom out over bumps. Depending on how much driving you are doing and how much you want it to be lowered, that might be a trade you are willing to make.
