Need Help | don't know where to start

I want to create a Python program (preferably with Tkinter) to simplify code creation for a simple custom language, and I don't know where to start. A simple program in this language would look like this: 511 (Save IO1 in RAM1) 522 (Save IO2 in RAM2) 112 (RAM3 = RAM1 + RAM2) 633 (Output RAM3 in IO3) (IO3 = IO1 + IO2)