I did my second ever 10k today in 61mins. There is a local half marathon in September and I'm tempted. Realistically I struggle to fit in 3 runs a week but could do it for a fixed period of training for a half. I have not really completed enough training for the 10k, only regularly run 5k, so am to some extent winging it and I know that wouldn't work for a longer distance. Is it achievable for a time-poor person?