See it depends on the examination you are preparing for. Adda247 is a moderate platform to prepare for competitive examination but its not highly recommended. If you need to take live classes then going for more reliable teaching platforms such as Gradeup, Career360, Unacademy etc will be more helpful. If you think that you feel good to study from Adda 247 then go for it but if you want to have more subjective and expertized platforms then I would recommend you to go for the above mentioned ones.

I hope this answer helps. All the very best for your future endeavors!