Please start reading these guides:
- https://darth-coin.github.io/beginner/beginner.html
- https://darth-coin.github.io/wallets/wallets.html

DarthCoin

You can run a LN node to spend sats on your phone. Read @DarthCoin's guides.

megaptera

But without running a node myself which is difficult here in Belize considering electricity reliability my LN Sats are more or less custodial. If there are other projects in the works I'd like to be aware of them sooner than later.

MadBudha

bitcoin

BTC Layer 2's

Lightning network is the only real L2 which is currently operational. Everything else is probably a sidechain or a scam. 