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.