Even though the average time between blocks is around 10 minutes, you can never be certain if your transaction will be mined within that timeframe. Sometimes, no block is found for 30-40 minutes. You can also get lucky and there might be a few blocks mined one after another in a short period of time. As for the fee, 1 sat/vbyte has been enough to get a transaction confirmed quickly for quite some time now. You should check mempool.space beforehand. It seems to have very accurate estimates.