Can i stop my marines corps enlistment process?

( I'm giving details on how things were going in the last two months. I'm gonna give you a little background story so you can get the hang of things a little bit. Sorry if it's to much )

To break it down let start by saying that i grduated highschool not long ago and i do want to join the marines and it's something am looking for towards my future. Two months I asked my cousin to help out in enlisting into the marines, he called his connections and hooked me up. So early September I walked into the marines office, I meet up with the recruiter ect ect... I take the practice test you're supposed to take and I failed it. ( don't judged me ) He tells me to run for 30 mins and practice for the test. I do what I was asked to do and I improved in everything. I can run 40 minutes now. I go back and I ifaled the test by 3-2 points. He tells me I've improved but I need to study a little more.

Now to start of let say that English is not my first language.

Anyways things have gotten hard in my house. I live in a poor ghetto community with a lot of violence In it. I'm trying to get out of the circle Im in. I got a sick mother and were 6 months behind rent + all the bills we owe. I got an inrresponsible father and I can't count on him in anything. I wanna leave calm and with no worries. I just doubt they would understand me and think am making up excuses not to join.

The main question here is can I stop my enlistment process? And continue it early next year??!?!