What advice would you give to start career in graphic designing?

Good luck! My dad's been a graphic designer for 18 years now. He went to the Arts Institute of Fort Lauder dale. He worked for Blue Seal Feeds animal food for 16 years, until a mother company bought them out and let go of everyone in dad's division. Ever since then, he's been applying to pretty much everywhere, but he's been looked past and younger, mostly girls got the job over him. Luckily he has freelance. Do you know what that is? You can have little jobs here and there that can pay you, but you don't really work for them permanently. He's struggled pretty bad but somehow we make ends meet. 

If you're gonna apply to a good company, make sure they're gonna stay in business. Although freelance ins good, you don't get paid on a weekly basis, and you might not know when you'll get paid next.

One of my daughters earned a degree in animation and graphic art / design. It was amazing. She landed a high paying job with a government contractor almost 30 days after graduation. But  after 18 months the contractor lost the contract and folded up. She wound up delivering pizza for almost two years. But while delivering pizza she made contacts within different companies who would hold onto her resume just in case and one finally paid off. She was back in the saddle with a more secure position and has been there for more than 8 years.

So I guess the answer to the original question is graphic design is a unique career that has its many ups and downs just like any other career. But its downs can last longer so be prepared at the outset.