Guide me guys

i am a student 16 yr old , ( i want to have a good life later ) so i am in first puc took the combination of PCME ( electronics) . i want a job of atleast 1 lakh . i want to know some skills which can be taken online (like coursera,udemy) , lets imagine i get 90 percentage in 12 and got under 10,000 rank in CET , which college should i go for . what skills have high demand but less people with that skill, what are some advice which you would like to give , what decision have changed your life , what are some mistakes which i should avoid in these years , i would like to marry around 25 or 26 , hoping for a love marriage .i have good life right now no financial problem but i want to be independent. i just dont want to have a bad future just because i was enjoying . ( i have no specific interest , so what pays high i will make that as my interest ) dont want my parents , kids , wife have a bad life . thank you guys