Welcome to the club

If you want to just play games then you don't really need them. They are easy to find on the internet but as PCs can't write Amiga floppy disks it's a bit of a pain to turn them into real disks.
I am sure a helpful person will offer to supply you with a copy of what originally came with the machine in 1992-5 etc ie the 5 Workbench 3.0 disks. You are entitled to one set of Workbench 3 disks with each A1200 for those crying 'piracy' here.