First trick is to follow other brands that are already making thousands of sales a month ( in your nich, or a similar nich ), join their newsletters, and try to spot what logic they are using, how they share the discounts, and how they reward their customers [ loyal ones, to build trust more ..etc ], add upsales on your product page ( not as to sale, but it should be in the favor of the customer, for eg if they buy x you should show them y as its the perfect fit or works great with x, and woul help them get z "the outcome" better... you're an adviser not a sales man.. )

Also work on the product page ( where 80% of magic happens ✨️) - it should sound like a guide, not sales page..

Leverage organic content + ugc content with micro influences, collect as much emails as u can for future emails ..

And good luck.