Answer:
Hello Uncle Joe,
I hope you are doing well and enjoying the summer. I am writing to you because I need your help. You have always been there for me and given me the best advice. I am a junior high school student who wants to further my education in order to get into a good college. As it stands now, I can't afford to go anywhere on my own and I'm not sure how else to get there.
I want a better future for myself, so that I don't just end up working a dead-end job in town when the school year ends. College would give me an opportunity to learn new skills that could lead me into any career of my choosing later on. This is why it is very important for me to go on with my education now and study hard
(My bad if this wasn't what you were asking for)