Here's a list of essential hand embroidery supplies which I think are great for beginners to start with when first getting started with hand embroidery.
Basic Embroidery Stitches Sampler –
Chain Stitch, How to Work Chain Stitch in Hand Embroidery
6 Essential Hand Embroidery Supplies for Beginners - Easy Sewing
10 basic stitches for hand embroidery - Stitch Floral
How to Embroider by Hand for Beginners - Cutesy Crafts
Rainbow Beginner Kit-hand Embroidery Stitch Sampler-embroidery
An essential guide to embroidery hoops: When, why, and how to use
Sewing Projects for Beginners: 20+ Easy and Free Tutorials - DIY Candy
Modern hand embroidery patterns to download // PDF embroidery
15 Embroidery ideas embroidery, embroidery patterns, hand