The most important tip for me is that you have to find an specialty that you like and improve your skills at.
I mean "Logo design" is a "category" but hand writing logo is a "specialty"
That mean if you wanna be a hand writing logo designer, you need to have deeper understanding about typography and skills of calligraphy.
then you will be a professional.
designing softwares become easier year after year and anyone can use them now. so ask yourself what difference between beginner and pro.
beginner always think that he can do any type of design once he know how to use tools. A pro has a specialty that he can do perfectly.
I don't know how to use social media to have clients, -to be more specific- I can't understand how to make clients come to fiverr instead of using private massages. and making the task away from fiverr which is not good to me.