It seems like the bc1 address is indeed you change address then, but your wallet has automatically sent the change from your legacy outputs to a segwit address. I wasn't aware that Bitcoin Wallet for Android did this.
You can use this 747 satoshi to perform a CPFP transaction, but the problem you have now is that it is not enough to perform a CPFP transaction by itself. You would need to deposit additional funds to your wallet, and then spend those additional funds along with the 747 satoshi in a further transaction. While possible, this becomes significantly more costly since you have to make two further transactions and your second transaction needs to include two inputs.
Conversely, given how full the mempool is with low fee transactions, and it showing no sign of clearing down to 2.5 sats/vbyte anytime soon, you could be waiting for a week or more for your transaction to confirm, or it might never confirm at all and be dropped from the mempool. If this were to happen, then you can simply try to make the same transaction again but ensure you pay a higher fee this time.
You can use this 747 satoshi to perform a CPFP transaction, but the problem you have now is that it is not enough to perform a CPFP transaction by itself. You would need to deposit additional funds to your wallet, and then spend those additional funds along with the 747 satoshi in a further transaction. While possible, this becomes significantly more costly since you have to make two further transactions and your second transaction needs to include two inputs.
Conversely, given how full the mempool is with low fee transactions, and it showing no sign of clearing down to 2.5 sats/vbyte anytime soon, you could be waiting for a week or more for your transaction to confirm, or it might never confirm at all and be dropped from the mempool. If this were to happen, then you can simply try to make the same transaction again but ensure you pay a higher fee this time.
Thanks for your input.
Another question @oeleo
So if I would deposit let's say 50$ on my android wallet and send that 50$ to another wallet (for example binance) with a good fee, miners would pick up the transactions and they will confirm?
