• Should I have a cold wallet AND a hot wallet at all? Like, should I for example use a hardware wallet to receive, mine, and send Monero, instead of having more wallets?
• Should I make a paper wallet with the app that can be downloaded to make offline wallet keys? Then how would I see balance, sign keys, etc.?

For BTC, even though I never actually used it (never got BTC), I saw Electrum like this:

• Create wallet in offline device
• Export view key to online device
• Create TX in online device
• Sign TX in offline device
• Broadcast TX in online device

But for Monero I’m clueless, because I haven’t found any guide properly explaining it.