I Need G.e.d. Info Please?

okay i failed my first year of highschool…and since then everything has been screwing up badly for me.
im supposed to be a junior, but im still a sophmore.
i have to have 12 credits to pass this year…but i was truent so they took A LOT of credits away and now i only have 6 1/2
i want to go to college and have a better career, but i cant get anything to work out anymore, i get decent grades and i pass all my tests…but i think i might fail this year too.
can i still go to a ‘GOOD’ college with a GED?
can i have a good career doing something thats not driving a semi truck, washing dishes, being a mechanic, or a male nurse?
i need help.