Confused about whether to watch lectures first or just start solving questions alongside , please help

I am just starting my prep now , according to my study plan of 13 weeks i need to do 100's of quant questions followed by 25-28 sets of DILR and 34 passages of RC , i am confused that whether should i first complete all lectures of the particular topic and then start solving questions ( then i need to do more questions on per day basis as most days will go in finishing the lecture ) or should i start solving questions from 1st day onwards while watching lectures side by side , i will be grateful if anyone could help me . thank you.