How do I fund the wallet?

What are the transaction fees?

Are the transactions private?

Where can I spend Sats or what can I buy?

What are the risks with using lightning (custodial)?

Why do people keep telling me to run my own node?

Why do tutorials recommend opening a channel with a minimum of 1M Sats (~$4K), while also saying that it is experimental and you shouldn't put too much into it?