Letters can open a view into the personality of character.
Dear Young Gina,
Here I am, your older self with the unique opportunity to reach back through time and offer some guidance and a bit of hope for what you are going through. On this side of time, I know you've been crushed and I know you feel like too many bad decisions have led you to where you are.
About to lose hope.
About to give in to the dark.
Let me tell you, the dawn is coming and the best thing I can tell you is to make decisions in the light, specifically in the light of the truth of the Gospel of Jesus Christ. I know its full truth, its full light is not yet fully on you. Oh, you think you can see, but, truly, like the apostle Paul, you see as in a mirror darkly.
So seek the light of the way of Jesus, who said he was "the" light. For every step. For ever decision. At every juncture. To deal with every siren's call or earthly plea. Turn the light onto your path. Go to the well. Sit in those moments at the feet of the Light-giver.
Many such moments will come upon you when you don't even realize you have a restricted view. You'll rest in your own knowledge. You'll lean into your own desires. Instead, let the light shine onto the knowledge Jesus will give, consider (and come into agreement) with the desire of the Christ for you.
Don't be so late in coming to his light - it will be clarifying for you and many others. The light of life will enthrall you! Stay trusting of the One worthy of it. Stay loyal to the love of the Father. This will grow your faith and it will shine through you.