It took 3 walks to the park due to bugs and unhandled exceptions but it worked!
The python script connects to a node that is left at home. The bot can detect and process a message with the following format:
PST
Com: Meshtastic
Sub: Posting via Meshtastic
Bod: Made a python script to create posts via meshtastic messages. If you can see this, the test worked! Posting from the park with no mobile data ^_^
It will parse the message and create a post. So, as long as I can reach my home's node I am able to create a post.