Welcome to Aorg and the Amiga community!
Take a look on Aminet for cool utils, back2roots for cool (legally downloadable commercial/pd) games
there are a few transfer tools from pc->amiga (via com-port), if you're lucky you got a basic compiler on the Miggy and you can compile yourself a free transfer program called 'wartrans' iirc, otherwise there's Cloanto's AmigaExplorer, wich works great. To use hd disks with a dd diskdrive you can simply put tape on the left hole of the disk.
Also, with some soldering around, you can solder yourself a joystick-mouse switch (soldering scheme can be found on Aminet, visible with for instance the program AHAview under Windows, dunno a viewer on Linux wich can view this kind of files)
just some of my hobby practices
happy computing :-)
