Dear student,

As you said that you failed in GUJCET entrance exam and in Board exam you should study well and pass the exams next year. Don't be sad and start studying. You'll pass in the exam if you study well. Make a timetable and study accordingly. Focus on the subjects you are weak in. Practice previous years question papers. Study the concepts from YouTube if you don't understand any concept and also notes are available in online.

Hope this helps!!