If you’re obsessed with 2D (flat) vector art like I am, then you would love the amazing works from Kit8.
They have a youtube channel where you can learn how they create their master pieces. The downside is, it’s ‘Speed art’ so you may have to slow it down a bit.
Freepik offers a variety of graphic (templates) for your project (commercial and personal use).
One thing I love about Freepik is you can find just about anything you need for your next project: logos, call card design, vector, wedding invitation, baby shower posters, calendars, ribbons, icons, web elements, web templates, brochures and much more.