I think you can design your website with many free items online. There are copyright items ranging from themes to images that you can use to design your website. Some themes comes preloaded with different designs.
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Canva is one of the best place in which you can create any design for your various account ,including YouTube art work, instagram design and also YouTube and Facebook design.I'm second to you Canva is best place to get idea for all your accounts including Logo, Youtube related art work, Instagram and etc. You can also use pro version for 30 days and tray it.