PaGaN, you have more than graduated. That's a a very solid world map, when it comes to tectonics.
Move on to heightmapping, but don't get trapped in the detail - a 10800 x 5400 map in detailed altitude is a lifelong project! Unless you plan to leave your half-baked world for your kids to continue and your grandsons to complete, think carefuly about the level of detail you want.
Like everyone else, I'm envious of the solid tectonics and resulting landmasses - I wonder how climate/oceanics will work out and how civs will spawn and interact... (long down the road). Massive kudos for your achievement so far! I'm in awe.