beam bushes can be a very circumstantial job to do. The more worn they are before you start the easier the old ones come out. I've done probably 4 Golfs in my time and some have been really easy and others have been total nightmares.
Best done on a 2 post otherwise you'll be on your back A LOT!
The tool to do them can cost around £80 from Laser, but in essence it literally is a massive threaded bar, 2 nuts, 2 massive washers. The Poly bushes are flat on edges, while the normal one can be odd shapes.
Without this tool the job will be a massive ball ache.