can i use ramps

You need to drop the transmission from the bottom, but ramps won't help, in fact they will get in your way when taking out the axles. Jack stands under neath the rear of the engine compartment on on the frame rails and a jack to support the engine and even an engine brace that goes across both strut towers to support the engine when the gear box is being removed will be needed.

You must seperate the engine from the transaxle to replace clutch. You will have to use something to support the engine if you try dropping the transaxle, easier to just pull the engine enough to seperate the two.