how much are the fees for sending eth from Coinbase? Or what exchange has the lowest fees for sending etherum? Thank you!
I think you should be using metamask and possibly uniswap (if you need to convert from another coin into ETH). Coinbase fees can be high and I'm not sure how practical it is to use that wallet as a developer.
I personally mine monero, but unfortunately don't have any ETH right now (Although I have some small amount of BTC and two other coins). I use a hardware wallet for the most part. I do suggest getting a hardware wallet when you can, as leaving the exchanges is probably going to save some money.