if you do this in the order i announce you will be fine.

from what i recall you have a fairly stock sr etc. 3 inch dp correct??

jack the car up and get 4 jackstands on there. i am assuming you know where to put them.

drain the tranny fluid

take the shifter out

remove clutch slave cylinder 15mm's i believe

remove the drive shaft ( 14mm from the rear pumpkin ) 17mm for the mounting bracket in the middle, then slide it out.

if u have another jack then proceeed to jack up the front of the motor, by doing this your motor\tranyn will tilt down, loosen the motor mounts if u can't get enough angle. deep 14 mm socket.

but the best way instead of what i mentioned just above. take a scissor jack and place it between your downpipe and the underchassis, doing this will also angle your tranyn down.

after this you should have some good angle, remove the tranny bolts. then bench press it off, wiggle it a little while removing it. since this is your first time i recommend u have someone with you.