Redirect Main Home Page url to category URL without plugin
I am looking for best method without any plugin that will redirect my homepage to category url. e.g
Main page: https://uk49sresult.co.uk/
Direct redirect to this one.
Category URL: https://uk49sresult.co.uk/lunchtime-results/
It helps me to reduce the servers response time.
I have readed many answers but not provided full guideline. Please briefly explain me which code will paste to which file. I have no experience of programming but work a little bit.