Gaining subscribers on Instagram, selling your artworks effectively, and setting up a print-on-demand service on your website all require a thoughtful approach. To attract subscribers, focus on creating engaging content that showcases your artistic journey, techniques, and behind-the-scenes glimpses. Utilize relevant hashtags and collaborate with other artists to expand your reach. For selling artworks, ensure high-quality images, detailed descriptions, and a user-friendly purchasing process on your website. Incorporate a secure payment gateway and offer various print sizes and formats. As for print on demand, research reliable printing partners, integrate their services into your website, and provide clear product customization options. For a detailed evaluation of your artwork site, kindly provide the link so I can offer specific feedback. Good luck with your artistic endeavors!