Firstly, best of luck with whatever anyone chooses to pursue. It's no easy feat, but speaking as someone who was in a similar place, it's made a really positive impact on my life. I used to work in telecom and decided that I would pursue music production professionally. I won't lie and tell you it's been easy, but it's been so rewarding.
One of the first steps for me was to narrow it down. I knew I wanted to be involved in music, so I chose that as a starting point. From there, you can check out free classes on edX or Coursera. For something like $90, you can get a certificate. On your resumé, this shows that you're dedicated and determined in whatever your craft is and shows that you're a self starter.
Secondly, it's very important to showcase your skills. If it's something related to the arts/media, it's a good time to put together some reels or examples of your work. If it's not tangible, it's also great to explain what you're good at with some concrete examples showing why.
Thirdly, and this is more geared toward freelancers, commit to your role. You're not "trying to be a record producer." You're a record producer. You're not trying to be a graphic designer. You ARE a graphic designer. Let this outlook permeate. Build a professional website using Wix or something. Have a professional looking email footer. All of these things go a long way in telling potential clients that you're legit, which you are.
Best of luck to whomever!