Graphic designer is here

I am a graphic designer, so I designed a wedding card for my mam. She was satisfied with my work and suggested to me, that you should become a freelancer. Now I am willing to work with foreign clients. For this, I am struggling with some freelancing websites. If you have any suggestions to increase my graphic work then try to share some tips here...

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Keep it simple
Optimize empty spaces
Use hierarchy
Choose appropriate color palettes
Consider your color context
Minimize font selection
Build your portfolio
Typography
Keep your elements aligned

Here are some tips for your graphic work. I hope you like it my suggestion.