The best way to start is with word of mouth. Encourage your current customers, relatives etc to spread the word. Second, join a local reptable organisation. They usually have a referral network and when you belong to the accredited organisation, it increases your credibility too.
Third, you could market your business online through facebook, linkedin, and twitter for free. as well as other local networks like - <a href="https://www.smartguy.com/register.asp">https://www.smartguy.com/register.asp</a>
I would suggest that you start with one at a time.
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I wish you all the best.