Not to sound rude but you may want to do some more research before ordering any more parts. This is a great guide to follow:
https://wranglertjforum.com/threads/stock-spring-swap-walk-thru-with-pics.12655/
Do not use a spring compressor, they are dangerous and can literally fly away and hit your face causing serious injury or even death. Cancel your order.
The only proper way to replace springs or work on them is by removing the suspension components that prevent droop. Here is a fast run down:
Starting with the front suspension; you need to chock your rear wheels and apply parking brake, Jeep should be in 1st gear or park. Disconnect sway bar links at axle, and track bar at axle with all four tires on ground. Frame connections can be left alone for now unless you are replacing sway bar links and track bar anyway. Loosen the front lug nuts.
Place a 3 ton floor jack by axle tube next to pumpkin and jack up until you have enough clearance to put jackstands on frame. It helps to use wooden blocks on your floor jack to gain extra height to pick the axle up high enough. You need jackstands on frame because you need the axle to move freely, to stuff it up and droop it back down while working on it. You need a minimum of 6 ton jack stands on the frame rails, 3 tons are strong enough but aren’t tall enough. If worried about scuffing paint you can put a rag on the top of the jackstand. Once both sides of frame rail have jackstands under them behind the lower control arm mount, you slowly release the floor jack and settle the frame rails evenly onto the jack stands.
Remove tires, remove shocks, then you have to figure out if you can get springs out. In some cases the drag link needs to be disconnected from the axle side. After that the stock springs should be able to come out by hand, if you press down on the axle with your leg it helps get them out. That is just the basics. It doesn't cover doing a bumpstop check, fender clearance, or tie rod alignment, or drag link adjustment, all of which will have to be done after. I hope that makes sense.
The rear is the same except there are no steering components obviously, you chock the front wheels and use 4wd, then you lift up by pumpkin.