128 on my first cold diagnostic LSAT

I just took my first diagnostic LSAT score and received a 128. I am devastated that I got such a low score and thought I would have gotten at least a 140. I am planning to take the LSAT in August or September and desire a score of 160+ and I will have 7-8 months with 350-450 hours of studying. I plan to apply for Fall 2026 in September. Is this a realistic and possible goal or should I just give up?