What we really have faith for is an outflow of the relationship we have with God. Our "mustering" or "trying" to have miracles isn't realistic. We can position ourselves for them and hope for them. Out of hope, springs forth faith. We must have hope first.
When we position ourselves correctly, doing the things that make for edification, keeping our eyes single on Him, and locating ourselves where God is moving, then when the anointing comes forth for things like miracles, we might have eyes to see and lay hold on them by uniting our own faith with them.
I think that every thing we do in forward motion with the Holy Spirit helps to qualify us to receive miracles. Not that we qualify to earn them, but that we must walk in the light, and we must believe, and we must love. The more developed in God's love we are, the more likely we are to receive miracles from Him.
In the meantime, we move forward in our renewal/healing/restoration right where we are now, using the means and resources available to us, His Word, etc. (might include doctors), and move forward into our inheritance, submitting ourselves to the tutorship of the Holy Spirit (often through anointed teachers) and learn to walk in what is ours as overcomers.