Keeping sats in Lightning wallet, and conversion to on-chain

So, since my ETF holgins are not kosher, I decide to try self-custody. But, being paranoid about both KYC and trading gift cards, I started small, by playing games and watching ads for ZBD-lilnked games. Returns are pathetic (several hundred sats on a good day), but I earned them, and they are mine, and nobody knows who I am.

I do not trust ZBD either, so I got my sats out to "Wallet of Satoshi", as Lightning Bitcoin. But now it wants 7,000 sats to send to my other wallet that only takes On-Chain Bitcoin. Which sounds pretty expensive. I can send out to other Lightnight wallets for a just a few sats.

1. Is it safe to keep Lightning BTC on Wallet of Satoshi for a while. (I need time to accumulate more sats, or find a cheaper way to get it on-chain) WoS did give me the very important 12-word phrase, but somebody online said WoS still holds the keys.

2. Is there a cheaper way to convert BTC from LIghtining to on-chain? Muun is also expensive, I hear. Zeus is supposed to be cheaper, but that's because you gotta "setup channels" yourself. how complex it is? I can do a bit of tinkering, but I would never try to install Linux.