Your work is what sells. A gallery of real cuts, colours and sets matters more than anything else on the page.
Show your prices. Most clients don't like to ask, and a clear price list, even with “from” prices for colour, means more people get in touch instead of moving on.
Plenty of people look you up late at night. A call or message button on every screen means they can reach out then, and you'll see it in the morning.
Don't rely on Instagram alone. Searches like “barber near me” bring in a lot of new clients, and a fast site linked to your Google listing helps you show up.