This article should is a good source for getting started in the space https://every.to/also-true-for-humans/how-to-create-your-own...

My 2c as someone who is working on this problem is that you can follow the 80/20 rule when making them for personal use - put in the 20% and you can make a good enough benchmark relatively easily. The remaining work is certainly valuable, and necessary to do if the benchmark is consequential, but it's a pain in the ass and hard to do correctly, so if you don't have to, don't worry about it

Thank you, will give it a read.