Guitar ensemble competitiveness

I’m a self taught classical guitarist, not amazing, but I have met teachers who have described my playing as advanced. I don’t believe I am good enough at my current level to audition for the guitar ensemble, I make lots of beginner mistakes, and I have huge gaps in my knowledge (as is common with self taught musicians). I am realistic about my abilities I would say, I know where I fall short and need to improve, but I want to know if it’s really hard to get accepted for the ensemble. I have until September to practice up because that’s when I start my first quarter (I’m a 20 yr old freshman coming out of a gap year after two years of running start).

Unfortunately I am not able to take lessons at this time, so I would be self studying until September. Just wondering if anyone thinks it’s possible for me to really improve enough on my own to get into the ensemble.