Hello Bitcoin Talk

I have been trading bitcoin and cryptocurrencies for about 18 months now and I have loved the rides and benefits from crypto. I have now decided that I want to invest in certain coins and spend time learning about mining and mining some coins.

I apologize for my terminology now. In terms of the mining rig, where do I start? I understand that you need X amount of GPU's all connected together and then a computer, raspberry PI or something along the lines to get connected to the pools etc.

What GPU's are best for mining?
How many GPU's would I need to create a high enough Hash rate for a passive income?
How do you find the best pools?
What software is best for mining?
What coin/coins are best for mining now? and how do you work out which coin would be more profitable?

Pretty much everything you guys can help me with would be awesome. I understand that I am asking for a lot but I would love to get involved with the mining world and I can't think of where better to find that answer than here with the pros!

Thanks
I have something like this in mind