What's the one thing you wish someone had told you before your first sale?

[Nick Jonas]

So I hit my 100th order last week and spent some time just thinking about how different reality was vs what I expected when I started.
Nobody warned me that my first sale would actually stress me out more than excite me - suddenly there's a real person waiting on a real package and you're refreshing the tracking page every 2 hours like a maniac lol.
Got me thinking - there's tons of threads about how to GET sales but not much about what happens mentally and practically when they actually start coming in. The first order, the first refund request, the first customer who's actually happy enough to leave a review.
So what's yours? That one thing nobody told you that you had to figure out the hard way. Could be technical, could be about suppliers, could be something nobody talks about. No generic advice please - real stuff only.

 

[Cali Velasquez]

That your pricing will be wrong the first time and that's just part of it. I spent so long trying to find the "perfect" price before launching and then changed it three times in the first month anyway based on actual data. All that pre-launch stress was pointless. Just pick something reasonable and adjust when you have real numbers in front of you.

 

[David Robinson]

nobody told me how much a single bad supplier can wreck everything. had one product doing really well, supplier started shipping late, reviews tanked, took me two months to recover that product's reputation. now i vet suppliers way harder before adding anything to the store. learned that one the expensive way lol

 

[khamen]

That first sale anxiety is SO real. I was refreshing AliExpress tracking like it owed me money. Mine was shipping expectations. I had 15-25 day delivery in the fine print but people start checking their mailbox on day 3. Got my first angry email on day 8 - I wasn't even worried yet and she was ready to file a dispute.
100 orders is solid though, congrats