Step 1: Get Eth Wallet with MetaMask
Step 2: (For AMD GPU users) download lolMiner (use 2miners for pool & further tutorials)
Step 3: Mine
Step 4: ???
Step 5: Profit!
You can be done within an hour setting it all up. Getting about 62 MH/s with an RX 6800 @ 130ish W. That's around $150 a month, means I'll get my money back in about 6 months then it's pure profit. Just in time to switch to a refreshed Ampere hopefully.
Of course, it won't stay that profitable that long but hey, better than losing value! Plus if you got an Ampere GPU you're doing even better as even a 3060 Ti can do those numbers and that's way cheaper & for less power.