Manually, personally, and without scalable 'marketing' at all: your existing network told plainly what you now do, direct outreach to people with the exact problem, and over-delivering for the first few so referrals start compounding. The first ten are sales, not marketing.
In parallel, build the free foundation that makes every later channel work: a credible one-page site, a completed Google Business Profile, and a review from every early customer while gratitude is fresh.
Resist paid channels until you can articulate — from those first conversations — who buys, what words they use, and what objection stalls them. Ads amplify a message; the first ten customers are how you find it.