Bitcoin’s transaction fees are incentives to a miner to validate your transaction. The more you pay the faster your transaction will be processed.
Fees vary from time to time. But for example: A fee like 5 sats/vbyte could take days to be confirmed or instantly, but 60 sats/vbyte could take just hours or minutes.
You can always look at the fees at the moment of your purchase here https://mempool.space/. High priority would probably be confirmed in no more than an hour.
Here is also a video explaining how Bitcoin transactions work:
and a video about Bitcoin: