Building an entire world seems like a lot of work. You're going to put a lot of time and effort into it, especially if you are a dedicated worldbuilder. There is so much done, and there will be a desire to create more work for yourself by trying to detail EVERYTHING. Well, here's a tip. No matter how hard you work, you can't detail everything. You can, however, get a good solid foundation and then pick a few important locations to detail. Your challenge is to create a forest clearing, oasis, or cave. Detail it, use directions, topological features, resources, and even draw a map if you feel like. Describe what lives there and why, and if any sentient people live there, describe them and the general sound of their language. You can work alone or with someone, and don't be afraid to ask someone to help if you get stuck.