I'm a newbie. Week 1 completed this morning. I planned to get proper shoes in UK next month (I live in Hungary) but the day after W1R1, I had shin pain and felt quite disheartened. Hubbie - and the wonderful advice on here - told me that old dog-walking trainers weren't up to the job.
I walked up and down outside the local running shop for five minutes before working up the courage to go in. I felt a fraud. I'm not a runner, why do I need fancy shoes? Surely they'd laugh at me. Well, I couldn't have been more wrong. Lovely people, gait analysis, numerous shoes, pigeon-Hungarian and English plus lots of sign language, and numerous options tried, and I'm the proud owner of my first pair of running shoes. Runs 2 and 3 were so much easier (at least on my feet and legs) and now I'm more motivated. I can't waste the money I spent so I have to get to complete this challenge.
Lesson learnt - it's never too early for the right equipment.