Yes, I also once thought that everything would go quickly, but in the end it took several weeks just to prepare. The hardest part is deciding on the company structure and understanding what documents are needed for filing. I had experience registering through an online service, and this made the task a little easier. I recommend starting with the basics, for example, here: llcbuddy. There are step-by-step instructions and recommendations for choosing a business type. If I had found this earlier, I would have saved a lot of time.