robosats VS OB_ReturnCabin

Bisq, Robosats, HodlHodl, Peach, Vexl, CivKit (beta)

https://learn.robosats.com/ or https://bisq.network/

Robosats, Peach, HodlHodl, Vexl, Civ Kit

https://learn.robosats.com/ or https://bisq.network/ are both popular If using a DEX like bisq you will need to have a small amount of btc to get started though https://bisq.wiki/Getting_your_first_BTC

Robosats - P2P Lightning exchange over Tor

Bisq, RoboSats, Hodl Hodl, AgoraDesk, and LocalCoinSwap are some of the peer-to-peer cryptocurrency exchanges that make it easy to find someone to buy bitcoin from (peer-to-peer) without KYC.

Have a look at RoboSats https://learn.robosats.com

But there are also other trust-minimized no-KYC P2P bitcoin exchanges like Robosats, Peach, HodlHodl

Once this step is done: For future bridging, I recommend Orbiter.finance https://www.orbiter.finance/ (lower gas fees) to bridge to ZKSync.

In step 5 it says "Go to https://www.orbiter.finance/ and do the following: Select Arbitrum Nova as the network you're bridging from, Select Arbitrum One for the network you're bridging to."

Visit the Orbiter website and connect your MetaMask wallet to the site. Initiate the bridging process, allowing you to move your Ethereum from Arbitrum One to Arbitrum Nova. Follow the prompts and wait for the confirmation.

Seeing your other comments you converted BTC to ETH then sent said ETH to your wallet on the zkSync network, if that's what you did, it simply the same address as your eth wallet, if you want to take your ETH out of the zksync network, you can use https://www.orbiter.finance/ from there you can select zksync Era as the source network and then send it to the network of your choice, the destination address is the same as the one the original funds come from.

I used https://www.orbiter.finance as a bridge.

https://www.orbiter.finance, layerswap just a few I found. Let me know if you need more..

The bridges I use to go from ETH mainnet to Polygon (and vice versa) are umbria and orbiter fiance. Never had any issues with these and a lot of people here use them because they are usually pretty fast and have relatively low fees, but as a disclaimer I just want to add always use anything you're connecting your wallet to at your own risk. And don't take any help offered to you in the DMs as they will be scammers. Good luck!

You can always use the official bridges, but I love using Orbiter.finance for bridging, it's one of the cheapest options and works basically instantly.