Some things to keep in mind - if you go GPU it's easy to build, but you'll be mining shitcoins - if you do go that route then nicehash is the easiest route.

If you go with ASICs then keep in mind that the payout in BTC terms will continuously drop as the days go by because more and more power will be added to the network.

Ignore anyone who says "and S9 will produce x bitcoin over x time because they literally have no clue what they're on about.

One of the upsides to ASIC mining in non kyc coins, however it can work out cheaper and easier to use the money to buy the BTC then clean it up with a few transaction. Another upside is that you're contributing to the networks decentralisation.

Don't expect it to be mega profitable straight away, most early miners minednfor the sake of it, not really expecting to get rich.