Congrats on getting an Atari 400. That was my first computer and still have one and play to this day. The keyboard doesn't bother me but some hate it. Games I would suggest are Star Raiders, the first A8 I ever played back in the day. Also Miner 2049'er a great platformer. Oil's Well, Ms Pacman, Jumpman and Jumpman Jr. Also get a Disk Drive. And many more, enjoy!