Total cost / target margin = nominal breakeven sales

Do the math and see if it’s achieveable. It it looks reasonable, then break sales down by units / month and or units/ day. If this numbers look achieveable, then make a plan and try to execute.

Show what you got to different segments if your target audience. See which one shows best interest.

The Business model canvas book is pretty good for this.

Freelancers yes. Consultants no.