Keep steadily engaged in Sadhana and never hesitate once you have decided on it. The first step is practise of silence. Then, you can more easily recognise the galloping of the mind behind worldly happiness. Restrain its movements; turn it inside, into the calm lake of bliss that lies deep in the heart! Get over fear by establishing your mind in the One; for fear can arise only when there is another.
You need not rely on another for success in Dhyana. Pray to the God within you and you will receive the needed guidance.