With the extra focus on tech startups and social media the demand for graphic designers and people who understand Ui/Ux keeps on increasing too.
These are also some skills that you can learn from Udemy, YouTube or Skillshare and then get started with a couple of businesses of friends or family to get some experience under the belt.
You might have to start working for relatively cheaper prices at the start but once you have some experience it is straight forward to earn substantial amounts of income through this.
Want to scale this? After you lockin 3-5 clients hire one more designer to take that workload off of you and then ramp up the operation.