You will earn fees unless you are incompetent.
You will not make a profit. It isn't impossible, just unlikely. If you do make a profit, expect it to be on the scale of a small nostr accounts zaps.
Do it anyway. Sovereignty and knowledge matter. Prioritize channels with members of your local meetup.
Buying and selling locally produced products over lightning direct on your open channel with the other party who you know in person is currently peak bitcoin. It has been for a while no matter bitcoin xitter is excited about today.