[Asking4Advice] New to ETH, just got first payment

HI! as the title says I'm quite new to ethereum and mining overall. About 3 weeks ago I decided I gave it a go because I bought an RX 5700 for my personal use when it launched and since I'm mostly working these days I figured out I'd be better if I tried to mine so I can make some extra bucks to pay bills.

Turns out that it did work! I use teamredminer with an ethermine pool and the card is working flawlessly and just today I got my first payment and here's where the Asking4Advice goes:

– I have my wallet in Coinbase and they charge when they are doing a transfer (sending, not receiving), is this the gas fee?

– Should I use another wallet, or is that just fine?

– What kind of known services I can pay with ETH (Amazon,Netflix, etc)?

– Is it safe to use P2P services to transfer to my local currency?

I live in South America so the options to transfer any crypto to Paypal is out of the question (the service is just not available) and the platforms that transfer crypto to local money would take about 13 usd dollars (including the coinbase transfer fee that i suppose is gas fee) out of the 75 usd dollars in revenue. It may not seem like much but to me it is, considering that is around two and half days of fully mining.

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So yeah, any explanations and advice would be really appreciated