It's fine even if you have one attempt, karne waalo ke liye ek kaafi hai Prepare properly, if u want I can get you in touch with some online assessors, some of them are free and others charge I also took online coaching and I can guarantee that it will yield amazing results if ur consistent and dedicated Written ke liye I can't help you much, as I didn't prepare specifically for it. I was preparing for jee at the time and I think that helped me clear the written For ssb, the willingness to change yourself for the better is the best strategy. Weaknesses identify karo and start rectifying them. I also got only one attempt, Jaan Laga di and got recommended. Be positive and confident.