As I'm sure you all know by now, transaction fees are really low now. It's a very good time to consolidate UTXOs, practice all kinds of transactions, play around with multisig, etc

To create a sub 1 sat/vB transaction, I had to add this setting in the config file of my bitcoin core node:

minRelayTxFee=0.00000001

I created the transaction in Sparrow (only 50 sats!). Once I created the transaction, it didn't get to the mempool right away, like it usually does in Sparrow. It did get into the mempool eventually, though - maybe after about 5 minutes.

And it did take longer to confirm - maybe 30 minutes or so.

You'll want to always check current fees in https://mempool.space/. And there's some odd patterns happening - the lowest fee in one block will be .2 sats/vB, and then the next block will be 1 sat/vB.

Maybe the miners are batching up the lowest fee transactions, so that they don't get right into the next block?

Anyway, it's a wonderful time to practice transactions.

If you're looking for some structured practice with wallets and transactions, take a look at my book Bitcoin, Hands-On: 28 “learn-by-doing” exercises to master the basics of managing your own Bitcoin, including wallets, transactions, and self custody (https://www.amazon.com/dp/B0F4SZSCH8). It's also available for free on Github (https://bitcoinhandson.github.io/BitcoinHandsOn/).