Start by installing EagleCAD, draw your schematic diagram in it, and start designing. It's really not that hard, especially as it's all low speed digital signals (no more than 16 MHz) so not much to worry about.
nsteele493:
I've been making my own cool clocks for at home...
Why not use a WiFi ESP8266 based Arduino (Wemos D1 min, NodeMCU, etc.), and let it get the time off the internet.
Then you never have to set the clock again, and you can add things like temperature (local display and/or webpage).
Leo..