If this map is for use in a game and not just being made for fun, consider where you want to start your game, and what things you want to have located there (swamp, forest, mountains, etc.) Start there and spread outward. Also, because it is so earthlike, you should have a good idea where things like mountains should go - and if you do decide to move the mountains, remember that the wet & dry places will move as well.
One thing to remember; if it's a fantasy setting, there would likely be alot more forests in Europe than in the real world - those forests were cut down for centuries to be where they are now. Also, don't worry too much about detail at this scale. You might just make a decision on major features and then zoom into a regional map before adding detail. Remember - anything you do to a region map can be added to the global one later if necessary!
Also, kudos on your coastlines - whenever I try an earthlike map it looks terrible; you did a pretty good job of staying in the 'close but not too close' area, and the coastlines are pretty decent. Above all, know that you have a very good starting place, and while we are looking forward to seeing the finished project, take your time and make sure you get the map you want!