Writer's Block!!!

I'm finally making progress. I started a very rough draft of country layouts. Not the entire world, but a few countries surrounding the island where the first story takes place. My issue is lack of knowledge/understanding of basic geography like tectonic plates, winder currents, ocean currents, etc. has resulted in a major writer's block, and a lot of self doubt. At this very moment, I'm staring at my map and thinking, "What if this isn't possible!? No...that can't be right. Nope, that isn't good either." It's a little frustrating. I feel like i need this before i can advance to the next step: Creating cultures. All of this is important for world building and character development in my stories. I would appreciate any advice on shaking this.

Enlightened said:

Tolkien was shrewd how he made the LOTR world (so his son could have it made into a map). He incorporated only the essential locations to make his fictional world (middle earth) comprehensible. Other parts, he called the void.

Tolkien used "void" to represent the uninhabited world; http://lotr.wikia.com/wiki/Void

Plate tectonics takes a lot of time (excluding earthquakes and oceanic byproducts of earthquakes). I'm uncertain how this is germane to a story that won't last long enough to see drastic changes from plate tectonics. How do currents affect storytelling? I think these are micromanagement issues. People like big picture. I think if one offer's too many minute details, readers will get bored.

Story supersedes geography. Locations can be described in words, as can temporary natural phenomena.

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Ocean and wind currents help determine stuff (or the process) essential to setting. Determining the kind of weather, for example. I don't want to write about a desert or a specific kind of forest, and then find out later that it's a major flaw in the world building because I didn't take the time to determine where deserts/certain kinds of forests would be located (not sure if this has anything to do with ocean and wind currents, but it is on my list of overall geography issues). This could be applied to any setting. This isn't for the readers. Rather, for myself to determine accurate settings. By determining accurate setting, i can set limits for myself and understand the environment, and build cultures that may prioritize certain things due to their environment. For me, personally, this will add another level of realism for me to my world. Even if the readers will never receive the information.