Hi Dima
If you are looking to use CNTools then you should look at the post that @Alexd1985 did names
How to set up a POOL in a few minutes - and register using CNTOOLS
You can go to the Cardano Github pages
https://github.com/input-output-hk/cardano-node/tree/master/doc/getting-started
Another good resources the Coin Cashew site
Finally another resource is
https://cardano-foundation.gitbook.io/stake-pool-course/
All of them include input on the testnet also
Kind Regards
Shad