I am and I need a little help

full image - Repost: I am and I need a little help (from Reddit.com, I am and I need a little help)

Ok, sorry if I sound really dumb, I am new to this.I have just created a MetaMask wallet and wanted to figure out how to use it.Apperently it can only deal with crypto that is based on some standart called "ERC-20" and apparently Bitcoin does not follow such standart.What standart does Bitcoin have?What ERC-20 crypto should I use for small payments (10-20$ range)? I don't want to use ETH since I heard you are made to pay high transaction fees.What if I wanted to buy some crypto for this non-custodial wallet using a method that MetaMask does not support like WebMoney or PayPal?Am I even able to trade crypto between non-custodial and custodial wallets?Will non-custodial wallet ask me for KYC verification at any point?

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Mining:
Bitcoin, Cryptotab browser - Pi Network cloud PHONE MINING
Fone, cloud PHONE MINING cod. dhvd1dkx - Mintme, PC PHONE MINING

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Exchanges:
Coinbase.com - Stex.com - Probit.com

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