I can vouch for the commands to install Python's PIP. Those I know to be accurate. (You can verify this by searching for other tutorials, as I'm sure they exist.)
I can NOT vouch for PyGPT's properly installing with PIP. From the looks of things, that threw an error - but I have no idea how far along you are in installing/enabling Python's PIP.
You should have Nano available. If you do not, you'll need to install it. In the article, where Nano is referenced, there will be a link that will help you ensure that Nano is properly installed.
You're trying to do something that's a little advanced. That's fine, but it means knowing what you're doing or following the instructions. I can only vouch for the first two articles - those are correct and heavily reviewed by others here when shared.
If I'm following your progress properly, PyGPT is throwing an error during the installation process. I can't fix that. If it had been installed properly, and you'd completed both articles, you'd simply start the application by entering pygpt
into the terminal. If you didn't complete the 2nd article, you'd enter ~/local/bin/pygpt
into the terminal (probably) to start the application.
But, there's an error (in red text) when you try to install it. That needs to be resolved, I'm pretty sure.