An 880 PSAT score is slightly below average, placing you in roughly the 42nd percentile for 11th graders. While not quite at the national average of around 920, this score shows decent foundational knowledge with room for targeted improvement. You've demonstrated competency in many basic concepts across both math and reading/writing sections, suggesting you have the skills needed to succeed with additional preparation. This score indicates you're within striking distance of average performance and likely have specific areas that need focus rather than wholesale skill building.
You're positioned well for improvement since you already understand many fundamental concepts. With focused preparation on your weakest areas, you could realistically aim for 1000-1100+ on the SAT, which would open doors to many state universities and regional colleges. Analyze your section scores to identify whether math or reading/writing needs more attention, then target those specific areas with intensive practice. Since you're close to average performance, relatively small improvements in your weak areas could result in significant score increases that move you well above the national average.