Need some Advice to sell on Amazon

I’m new to selling on Amazon and start my amazon journey with FBM. First, getting orders as a new seller is proving difficult. Despite offering the lowest price, Amazon doesn’t display my prices on the main page, making it challenging to attract customers. Do I need to sign up for the Professional plan to have my items listed on the main page? I was considering gaining some hands-on experience before converting to a Professional seller.

second, I’m grappling with high shipping costs. For instance, if I sell an item for $10 (COP-$5) and Amazon charges $5 for shipping, I aim to make a $1 profit. However, when I actually ship the product using USPS or UPS (whether through Amazon labels or private shipping), it costs me a minimum of $7 to $8. Do you have any advice on how to address this issue?