You have two options. Spend time individually picking fruit. This takes plenty of man-hours. It’s back-breaking work. This works well for vineyards and winemaking.
You could shake it up. Grab the tree by the trunk and shake it. Whatever falls off is ready. Sure, some fruits might stay behind, it’s a small price to pay for the significant savings in time and money.
We spend significant money on targetted selling through social media, search engines, etc. To compete in this space you need big budgets and big markets or make really good wines.
Alternatively, you could shake the tree and see what falls out. This is a good way to discover your customers. Give them a way to find you and they will.
Perhaps it’s less about selling and more about offering an experience.
Check out this inspired way to harvest cherries.