Here's what happens:
1. If they get credible tips alleging wrong doing, in the form of high crimes and misdemeanors (the Constitutional threshold), Congress can open up an investigation.
2. If the investigation finds proof that said offenses were committed, an impeachment inquiry is started, and the case is made to the House.
But back to your comment:
he business dealings is worth investigating and Holding Biden accountable.
That's step #1, not step #2. Would you like to re-read the Constitution? Even McCarthy was not willing to go that route, until they held a gun to his head.
But it's not like you're not in good company, with MAGAs who don't understand the Constitution.