It helps to focus on a specific interest. Maybe you enjoy writing about music, or are interested in a specific sect of science like Astronomy. You should find the topic you're most interested in and start writing about it. Don't feel pressured to stick to one interest either. Explore what you like and what you don't. The writing skills will develop alongside your exploration.
Networking helps with almost every job available. Join writing groups in your community (see if there's a local NaNoWriMo group that meets in-person or virtually.) Join your school's newspaper club or creative writing club. Find peers to review your work and vice versa.
As for pay, it can vary wildly based on what kind of writing you do and what industry you work in. If you haven't yet, I recommend looking at Glassdoor(.)com and searching for job titles in specific regions as pay is also dependent on your physical location.
Like I said, there is SO much variety in writing and what you can do with. Almost every industry has need for a writer. The best first step is to just start writing about what you love and get it out in the world.
I realize that's an overwhelming answer, so here are some things I've learned throughout my career as a writer:
1. Write. Every. Day. Keep that skill sharp and find educational opportunities to stay on top of current trends and fields.
2. Find out as fast as you can what you like to write and what you're good at writing.
3. As a writer, I don't write all day for my job. Most of my job is researching what I need to write. Researching can take up to 90% of the time it takes to complete a project.
4. Get familiar with SEO. So many writing opportunities are for web content, so the more you know about SEO the stronger writer and contributor you'll be. Check out SEMrush and Ahrefs for their free SEO writing resources.
5. There is a lot of competition. Many people want to be paid writers, so do what you can to stand out from the crowd.
6. If you are more introverted and are pursuing writing because you think you won't have to talk to people much, you'll need to get over that because you may have to interview people, collaborate with a team, and manage your writing projects which often includes different people in the company/organization.
7. Be comfortable with criticism and learn how to incorporate negative/positive criticism into your work.
8. Read. A lot. Read anything and everything from novels, non-fiction, ad copy, product descriptions, blogs, white papers, case studies, emails from retailers/service providers, and signage in shops and stores. Ask yourself what the writer and marketing team are trying to accomplish. How could you use their strategies?
9. Less is more. As writers, we tend to want to use a lot of words to get our message across. Learn how to refine your writing so you get your point across as succinctly as possible.
And with #9, I'll leave it at that. Reach out if you have any questions! I didn't even touch on freelancing. That's an entire topic unto itself.
What you need to become a writer are below.
1) Discipline knowledge.
2) Get a practice license.
3) Be able to research on subject of writing.
4) Develope writing skills.
5) Know about intellectual property (avoid plagiarism).
6) Know demographics like - regions, language, audience.
7) Know your publication budget.
8) Know how to finance your writing investment.
9) Get counsellors and authoring team like editor, reviewer and others.
10) Choose a good publishing company.
11) Know your marketing and promotion plan.
12) Network, create a blog and public profile.
Laura and Keith have pretty much nailed it. I'd like to add a web site. Medium.com
Also, there is a YouTube channel that might interest you. https://www.youtube.com/c/ZulieRaneWrites
If you want to read stories on Medium.com, you'll need to pay. It's $5 per month. However, you can sign up to write on Medium.com and that is free.
Zulie has instructions on how to sign up. https://www.youtube.com/watch?v=ZHOHZtO5NIM&t=350s
In addition to what Laura and Keith had to say, I hope this helps.