For very lazy people, buy Very Lazy Thing. The prerequisite to being a successful investor/trader is to be Very hardworking.
Take Will Rogers Advice; "Don't gamble; take all your savings and buy some good stock and hold it till it goes up, then sell it. If it don't go up, don't buy it."
With your strategy “Which company's stock we should buy” . . . you’ll be millionaire in no time (i.e., providing that you’ll start your trading career as multi-millionaire)
There's something like 20,000 different stocks and ETFs, so take your pick. And that's just in the U.S. not even considering worldwide. I day trade as well as options trade and I research almost every day using stock scanners/screeners, watch lists and other sources. As stated above, trading is not for you if you do not want to work at it. You might get lucky, but if you plan to trade as a profession then you have to put in the work and figure things out for yourself.