Congratulations on the progress so far and sounds as if you have an appetite to grow faster.
I am wary of too much advice for you here are you are the marketing expert in a digital sense! So maybe I’ll offer some really old fashioned advice – look at your successful clients so far, identify what they have in common and go looking for more clients that look like them.
And then get on with the cold calls! Nothing like the phone and some surprise and delight first contacts to get things kicked off. Do the maths and work out how many client wins you need to be able to start using your own expertise to advertise your own business…