I would suggest u read some books and watch a couple of YouTube videos in your chosen niche to get an idea of what it is to be in that industry or probably getting skills through the books and free videos.
After that u can choose to help someone grow his business like am doing currently or start a business from scratch to get enough experience.
But,u don't need all the experience stuff to know an industry first, u just need to learn about it and be willing to learn. That is all!
For example,I am learning all I can about ecommerce through books and interacting with store owners and giving tips which helps them even though I don't own a store now. So just be willing to learn and learn.

Currently, I am involved with many shopify groups but I operate actively in three.
-know your ideal clients and go to where they hang out often, for me, it is Facebook groups.
You cannot just go and pitch your service, you must first give value.
-so I set a period of thirty-fifty minutes twice a day to appear in one Facebook group ,where I answer questions pertaining to marketing and advertising.
You need to commit to this daily to succeed.
I do this by commenting and creating post which are geared in answering questions in the area of my speciality.
I plan to craft my blogpost to address their concerns on marketing,when I am done,I publish it in the group and on my page.Boost the blogpost with Facebook ads.
I also plan help one of my ideal client for a full week day,to get him/her as a client.
Just one hour a day for this target.