I will give you the ultimate advice to start up as a 3D Artist.
When I was in my dark time I got invited by CG Architect to attend The Shadow Society Meeting where all market leaders attend, I learned a lot and I got this one piece of advice.
“It’s ok to say no.” This comes as a surprise for me when I just started because we don’t have that much money so I asked, “why is it ok to say that?” He said that his client was comparing his price to another company’s price and he declined the offer. Saying that it’s better to give them the job instead. However, the client came back to him.