"your connection is not private" message when trying to enter site

[thelonelyradioshow]

For a while now when I try to enter my website I get a message saying "your connection is not private"
with a message about cybercriminals or whatever

I'm by no means a computer wizard so I guess I just did something wrong somewhere with connecting my domain to my hotglue or something. Can anyone help me out?

[thelonelyradioshow]

When I try to enter via safari it says this btw:

and then a whole bunch of info and numbers that mean absolutely nothing to me
Halp plzzz