Well done! Regarding your blisters, always wear two pairs of socks and buy your walking shoes or boots 1 size larger than you would normally buy. Also take out the insoles and replace them with 'Cush-N-Step' insoles, available on eBay (when you walk with these insoles, it feels like you are wearing slippers, they are so thick, bouncy and comfortable). I'd recommend them to anyone who has to stand up all day, shop workers etc. Walking is one of the best things you can do for your physical health and mental health.