A quick pairing session to help me calculate lot size based on atr and risk

I am not sure what else to say to be honest, the requirement is simple. I would like to add these feature to my bot. I categorised as advice because you don't necessarily need to code unless you want to. I have seen a lot of resources online but would like to expedite this process a bit so i'm throwing money at it. This probably wont take more than an hour if you know what you are doing, I don't but I will be able to tell if you don't.