Trying to optimise for sales and just wondering whether its worth running a/b tests or just leaving on dynamic creative? any help would be super appreciated

I was previously running a Facebook/Instagram Ads Campaing (optimized for Sales) in an attempt to start getting sales in my shopify page, matter fact I was able to get 1 convertion in the first night I was running it, but I didn't saw another sale in the following 2 days, so I got chickened out and I stopped the campaing completely (even deleting the campaign in the process😓) as I thought it wasn't succesfull. I am used to getting sales the first day I start an ad campaign since I mostly work locally. Since then I attempted another campaign which gave me the results I provide in the image below, however I didn't saw no sales in 3 days and like last time I stopped. I am currently working on my third attempt at succesfully running an e-commerce store, and I would really appreciate if I could get some help solving some doubts that have been brewing in my mind and I've been trying to solve for about a year now. Is it the problem that I haven't been allowing Meta the 30 days learning period it needs? Could it be that my CPM and CTR are below standar and I should focus on improving my creative and copy?

⭐How to set up your META campaigns from start to finish!⭐ - What conversion event should I optimize my ads for? (awareness/leads/engagement/sales) - How do I know if my campaigns are working (before I get my first conversion)? KPI's? - What is the ‘learning phase’ and why does it matter? (does it matter thooooo?) - Does ‘boosting’ work? 🤮 How is ‘boosting’ different from running ads in the ad manager?