hi... greetings... as there is concentration difficulty, it s better you start going through puzzles which make us you start thinking... also go through novels in your leisure time which improves your retention power... take a single and easy task, focus on it till it is completed...and then shift to another task... practice in this way helps you concentrate more... try to keep your mood happy all the times... Go for a morning walk daily and exercise 2 to 3 times per week which makes you feel relaxed which automatically improve your concentration... if you are still feeling problematic then consult a psychiatrist and take medications on a short-term basis for improving your concentration... all the best for your future endeavours and I hope I solved​ query feel free to ask any further