Shopify Custom Apparel Store

I need a complete Shopify site where shoppers can order clothing and add their own wording or artwork. The core feature is a product page that lets them enter personalized text through a single input field. That field must respect a character limit (we can fine-tune the max count together) but does not need font pickers or other style controls.

Here’s what I’m looking for:
• A clean, responsive theme adapted to showcase tees, hoodies, and similar items.
• The customization workflow built in Shopify (native line-item properties, a reputable app, or custom Liquid/JS—use whichever gives the smoothest experience). As long as the customer sees exactly what they typed and the limit is enforced before checkout, I’m happy.
• Standard store pages (home, catalog, about, contact) plus clear size charts and an FAQ.
• Payment, tax, and shipping set up so I can start selling immediately.
• Basic on-page SEO and speed optimization so the shop loads quickly on mobile.

Once the site is live, I’ll need a short hand-off guide showing how to add new products and adjust the character limit myself.

If you have previous Shopify builds that involved text personalization, please share a link; seeing a live example will help me pick the right partner.