How do I start my art career again?

I was told do ever never to give up a hobby. 

That voice was ringing in my ears. And yes, I love to paint, and I did think that I would be a professional artist after college. But I am becoming an ITer, handle the marketing job for pass 20 years. I really enjoyed that time, too. 

But today I had to re-examine my hobby, Oil painting. How do I start my art career again?

Here is my challenge following,

• I'm used to a fast lifestyle. How do I slow myself down?
• How do I find time to paint in my fragmented time?
• What do I draw?

At this moment, I like to share some paintings from my best friend, Jinhuo Lu. 

He gradually developed his own painting style, and I like the collision of colors and the interesting composition of the picture. 

I hope that I can find my way on oil painting, as I found the way to success in the IT industry for the past 20 years.