Alright, so it's actually super simple to create, can just be a little time consuming, but certainly worth the effort to ensure your shop stands out among the rest. First off, ensure that what you're posting follows the guidelines and rules outline in the Graphics Forum Rules.

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Start by selecting the New Topic button within the Graphics Forum section.

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Next, you'll want to ensure your Topic Prefix is set to "Requests".

After selecting your Topic Prefix, ensure you set your Topic Subject to something pertaining to what you're posting, in this instance - something along the lines of "TommehYT - Graphics Shop" would be appropriate.

After selecting your Topic Subject, begin utilizing the "Message body" tools to create your shop layout. I would recommend utilizing the following, for a clean and professional look:

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Here's some tutorials for various different programs to help create your layout, and any future requests:

Beginner-Advance & Expert Tutorials [Photoshop-Illustrator]

Ultimate Guide | Intro to Design.

Forum Sig Knowledge Thread | How To Rate | Standard Sizing

Paint.NET Tutorials and Resources

Have a good one!