Hours 04, 05, 06 blend together and iterating back and forth makes sense.
Bad photos, feature-led copy ("100% cotton, 200gsm") instead of benefit-led ("the t-shirt that doesn't pill after three washes"), broken checkout, no clear shipping or returns info. Customers bounce in seconds if any of this feels off. Getting the basics right on photos, copy, and a working checkout puts you ahead of most launches. For a service, the "product page" is your offer page and "checkout" is recurring billing — Stripe Billing, Paddle, Lemon Squeezy, or Memberstack handle it.