Welcome! Use the "anxiety" to plan and test. Do things like step into the shower with your rain gear and see how it works. Wear and adjust your pack to make it comfortable. Whether you use water bottles or a hydration system, be sure you are comfortable with getting to your water while on the go. Go through the items you are taking. Make piles of items you are certain you will use, those that you might use, and those that are nice to have. Brutally eliminate items and leave all duplicates behind. Try for dual use items. For example, since April may be cold, choose long underwear that will double as sleeping gear for cold nights. Do not expect the walk to be a fashion show, so pick clothing for warmth, washability, quick drying, and pockets. Style should be a last consideration. As many threads mention, footwear is the most important consideration. If your feet are miserable, you will be miserable. Discomfort will become your companion, but avoid misery! Buen camino.