I need suggestions on how to raise capital to start a skill you've learnt.

Lots of people learn amazing skills like cooking, baking, sewing and others like forex trading, blogging, etc. How will someone that has zero capital start after learning these skills? How will the person get money to buy a domain name in terms of blogging?

And other tech like graphics designing, programming, web developing, app designing, etc. How will someone get clients to patronize his/her skill?

If the person develop an app, how will he/she pitch it to the public without ads campaign? What if there's no money to run ads? All these skills still get down to start up capital. How can capital be raised?

How will someone find job to raise the capital when job is so hard to find? Please let's discuss, I need suggestions, no negative talks please.