I have some hairdressing scissors and thinning scissors cos I dabble in doing my own hair too. I just bought fairly generic ones. I think eBay probably sell them . Are you wanting to start with low cost ones ?
With use , the scissors likely end up blunt and needing sharpened.
People who work professionally as hairdressers likely put more thought into their scissors and they come in different sizes and spend a lot of money on them and look after them with regular maintenance. Yosaka are a brand with a good reputation.