I think the biggest mistake I made when I started running was being cheap with my feet gear. I had £8 trainers from Primark that were about 2 years old and my socks definitely had holes in them. I wanted to check I actually enjoyed running before investing lots of money into the gear.
Eventually I swapped the Primark for Nike trainers, and I've learnt the value of decent running socks - I buy mine from SOCKSHOP but these running socks (
https://www.sockshop.co.uk/products/ladies-1-pair-uyn-run-velocety-socks?colour=Coral
) are my fav. My feet are prone to blisters so these are fab because there's no seams in the toes to rub against my feet! If you prefer shorter socks like me, then these are ideal because they don't create that annoying itchy rub on your ankle! They're also affordable compared to other ones I've tried.