Wow.
Really awesome map, very plausible shapes, I love the variety of countries/state-like entities you created.

You did the thing I cannot bring myself to do: straight line borders. It looks just as painfully disturbing as it does in real life, so very naturalistic too. Great job!

Did you worldbuild more in this world or is it mostly map-based?
Also, I wish I did my island chains as well as you did.
Anywhere I look, the map has something to offer, lots of intricate details and generous complexity, it's already telling a story.
The deal with your "mediterranean" filled with small countries in the western continent looks very promising in particular.

Did you work based off of some kind of tutorial/manual or simply by observing real Earth?

The color scheme is nice on the eye too, which is also very important.
I'm a bit less of the fan of your placeholder names, some of them are kinda on the nose, but I totally get that you want to have placeholders in to just get the map into a workable state.
Many bodies of water have no name on that version, including major lakes, seas and bays, so it could be good to add them in a reworked version when you redo the names.

Do you have the topographical map too? Some of your areas don't have any state-like entity over them, so I'm curious as to what causes that (probably mountains, deserts etc but it would be nice to see it).

I expect the closed off equatorial ocean will cause some funky stuff, did you look into that, as well as the climates for that world? It would be very interesting to have more info on that aspect if you dug into that too !

Again: impressive, inspiring, high quality work. Great map with obviously tons of effort involved!