Welcome to the forum!
I would love to see some hair photos, and I can tell already from your description of your circumference that your hair is not thin! It's actually average thickness, so you don't have to stress on account of that.
As for an oily scalp and dry ends, you probably could use some deep treatments like the SMT and oiling your ends with olive or coconut oil (lighter oils if your hair is finer).
You are only 7 inches away from your goal, so just think about it -- with minimal cuts and a slightly above-average growth rate, you could be there by this time next year!
Happy growing!
ETA: It would also be helpful to know what your current hair routine now is, how you wash, what products you use, and how frequently you do it -- that way we will be able to offer more tailored suggestions.
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