I am not an expert in BTC mining, but I will tell you that if you want to mine seriously, you need to invest a large amount of money in mining devices. I also think that it is difficult to calculate in advance that you will earn 0.8 BTC, because you have to count on many factors - and also take into account possible device failures and interruptions in the supply of electricity.
There is a mining board, so I recommend that you look for the move button and move the topic there, or that you lock this topic and open a new one.
Mining