Being a 'not walker' I try to set myself an interesting route with lots of flowers, trees, old buildings, birds, park etc so there is something to see. I time myself at 45 minutes and then return. If I feel like doing more then I push it to an hour and maybe have a cuppa on the way if there is somewhere open. It's about making it worthwhile and the benefits are amazing - sleep, digestive issues resolved, blood supply fed around the body, sense of achievement if you keep a list of where you have walked, etc. You have to take ownership to make it meaningful to you and that is coming from me, one of the laziest people around. Also, right shoes, right socks, right everything to make it comfortable for you.