I’ve never done one before but I am fit and healthy, do loads of exercise every day and love walking so I really want to do this, but I don’t know what to wear? Obviously I will need to buy some hiking shoes/boots but what else? Can I wear my usual leggings, T-shirt and hoodie? I have a waterproof coat and a backpack. I’m guessing I should wear layers so that I can add/remove as needed? Any other advice?