I don`t think its possible to do all this on the A500.
You would need for OS3.9 and Browsing:
Hard Drive Controller and Hard disk
CD ROM Drive
020 Accelerator or better and Fast RAM
Kickstart 3.1
The 1st three items are very hard to find these days.
You would be better off getting an 1200 and upgrading that, as parts are easier to get than the 500 or it may work out cheaper to forget the classic amigas and go for an AmigaOne or Pegasos.
