Wordpress droplet not working

My website does not work consistently. First and foremost, let us say that this is my first website ever. I have followed all the instructions I could find on DigitalOcean and I have also browsed the questions, but nothing seemed to help (and mostly nothing made sense to me). So, please, explain things in the most dumbed down version possible.

I set up a Wordpress website, went as far as setting up the SSH key, and I do have a DNS set up (at least I think I do). I can open my website through the IP address, but never managed to open it through the domain on my computer. This is how it appears: https://postimg.cc/nMVQcB0Y (I am too much of a noob to figure out how to put images here, but it’s basically Chrome’s page saying to check the DNS and such) I tested on another computer and it did show the website. Same network, same operating system (Windows 10), even same model of computer. I have also tested on different browsers (Chrome and Firefox) on my computer, but nothing. On a third computer (running some version of Linux, don’t ask me which), it didn’t work either.

Also, this is how my DNS page looks: https://postimg.cc/F1Pkfz6t

What am I doing wrong? Please, help me. I am desperate and very lost.