We are all human beings we all make mistakes now & then. But we should learn from our mistakes.
This is a very good way to learn more. When you make a mistake, write it down to remember on your note book. & try to remove it next time.
Be regular in your habits.
Start your day with Bismillah & Ayitulkusy to read once in the morning & before go to bed.
Always try to concentrate on the things & rectify.
Inshallah you will improve a lot.