If you want to mine BTC you will need ASIC machines like Antminer s9 it's simple and easy to set up if you have them.
Read this "First time/Small miner reference for getting started." now if you decided to continue and want to mine BTC you can buy them directly on manufacturer's or verified distributor check this list https://bitcointalksearch.org/topic/current-list-of-competitive-hardware-january-2020-5045732
About setup or how to configure your own miner, I think you can check this profile https://bitcointalksearch.org/user/hagssfin-348185 under his signature you can find all guides/reviews you can use them as a reference depending on what ASIC machine you bought.