Electrum for Android does not have coin control features. If those are the only funds left on the wallet, then any transaction you make will include them. If they are not the only funds on the wallet, then to pick specifically them to be included in a transaction you will need to import your seed phrase to Electrum desktop client available from: https://electrum.org/#download. Make sure to verify your download before you install it!

I'm not sure where you are looking at the mempool, but it is incorrect. For the last several hours, the minimum fee required to be included in a block has been around 70 sats/vbyte. See: https://mempool.space/

I 1-input-1-output legacy transaction will be around 190 vbytes. Adding that to your two previous transactions, and assuming you spend the 19,693 sats you can spend from that address on a fee, your total will be 1047 vbytes paying 25,617 sats, which will work out to 24.5 sats/vbyte, which is nowhere near the required level.