Create a 9:16 aesthetic handwritten study infographic poster designed like a beautifully organized digital-notebook page. Use a soft pastel color palette with gentle baby pink, sky blue, mint green, lavender, and soft yellow highlights. Make the background a realistic notebook paper grid texture with subtle shadows and paper grain for authenticity. Use a clean structured layout like high-quality study notes, with neatly written handwritten-style typography in smooth black ink and blue pen. Arrange content in well-spaced bullet points, numbered sections, and small boxed highlights for key information. Emphasize important words with pastel highlighter strokes in pink, yellow, and light blue. Add cute hand-drawn doodles in the margins, including stars, arrows, hearts, smiley faces, paper clips, sticky notes, and simple icons such as books, pens, lightbulb, and checklist. Layer sticky notes naturally on the page with soft shadows, slightly tilted for a realistic collage effect. Make the composition cozy, aesthetic, highly organized, calming, motivating, and academically inspiring, like a Pinterest viral study aesthetic or Instagram studygram post. Use soft lighting, gentle shadows, minimal clutter for readability, ultra-detailed top-down flat-lay perspective, modern stationery aesthetic, soft depth of field, realistic paper texture, and high-end digital illustration style.