The smartass answer is that we should learn and know that before we venture into the crypto jungle. Right?
The answer from your buddy at the Saloon Bar is It all depends on which platform you are trading\swapping. RH, Uphold, Coinbase...all fairly easy. Wallets...those get a little tricky.
BUT...there are plenty of videos to be found that will walk you through it.
Typically, selling and getting your cash is just a reverse of the purchase process.