HUMILIATION FELT (20M)

I am currently in my 3rd year of engineering and am pursuing BTech from a tier 1 college . My family has all these achievers from IIMs, one who cleared CGL , other who is an ALP . All these guys are like too good in this aptitude and mathematics but as i have'nt studied it never so i do lack these skills and often feel humiliated by other family members for lacking in this . Now i want to learn all this as it will also help me in my placements Aptitude round so can you guys give me a roadmap and the YT channel or other resources to follow .