There are about half a dozen good quality private prep schools to explore that will fit your personal needs and more importantly preparing you for your Plan B and C.
Here are some points to consider……this will apply to both college or prep route
If you do poorly in your academic work this will not be competitive
Your academic schedule must mirror the first year of a service academy
You will need to maintain physical fitness performance (avoid freshman 30)
Continue will the three pillars, academics, leadership and physical fitness
You will need another nomination
Scholarships are available for both
No guarantee for an appointment even if you are sponsored
College-
You will need to take English, Math and Chem with a lab at a minimum
Pros- credits will carry on to the next year-continuing with your education
Social experience
Your college may have an ROTC program to become involved
Cons- Classes maybe full for high demand
Social experience-could distract you from desire to attend service academy
No ROTC program or can not participate
College does not have guidance or connection to service academy
Credits will not be transferable
Not an emphasis to improve ACT/SAT test scores
Prep School-
Pros-
You will be taking course work that will be similar to first year
Course work will improve your study skills
You will be taking ACT/SAT test and will improve those scores
Credits may transfer to four year college
You may have an advantage when seeking a nomination
Prep schools do have connections with SA and some report often
With improved ACT/SAT test results will open more opportunities for Plan B and C if not selected to SA
Cons- Expensive prep schools
Credits may not transfer
No guarantee for an appointment
A year behind your peers if this is important to you
MemberLG brings up a very good point about definitive data in regards to self-prep and attending college to build a better application when reapplying. Because there isn’t any. Its all just speculation from gathering information based on personal experience.
I hope this helps and its not impossible to get into a SA on a second and third attempted. You must understand only about a third of a class are direct appointments. I feel when you have a year under your belt, you'll be that much more mature and prepared. This make a huge difference.
Push Hard, Press Forward
Note: NWP splits their program. The first semester is course work sharpening academic study skills, improving vocabulary, sentence structure, math, chem with lab work. You will take ACT/SAT several times and have improvements. The second semester you attend a college near you. They are recognized by all academies and qualify for USMA AOG sponsorships.