I work at McDonald's, and want to start mining crypto to make some money. How delusional am I?

I work at Mcdonalds making 15.75 an hour in the midwest United States. I already have a Nvidia Geforce RTX 3090 that I can use for mining. I am considering buying a hardware crypto wallet before I begin using the GPU to mine crypto. Combining any money from that and money that I can put to the side which is about to increase by 700 a month because I will be done paying my current semester off out of pocket. I am 21 and live with my Dad.

I am thinking that I can slowly overtime use a portion of my extra income to invest in the necessary equipment. Is this a stupid investment? Am I being delusional or is there a potential for a solid ROI overtime that could potentially scale?

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EDIT: Okay I am aware you can no longer mine Ethereum so I changed it "crypto"

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EDIT 2: Definitely leaning towards simply investing in the coins. Profitability is extremely low currently, even if it was good to get in earlier, that is at small scales, warehouses of ASICs are what's making the money money lol. Also I cant just take advantage of the "free" electricity like that...thanks for the advice!