The Force is not a marvel superpower. It’s found in everyone. Midichlorians are just what generate when you believe in the force. From this raw talent you must work to hone your skills, just like any other task.
Like Obi-Wan says, you just need to let go. Child Anakin and Rey both dream of the tales of heroes, hence their initial talent. Then you need to hone your skills, which Anakin does in the Jedi Temple and Rey does through scavenging.
Luke was more challenging because he didn’t let go and was always skeptical. He wanted to be a pilot, not Jedi. But once he embraces the force at the Trench Run, he too understands.
So yeah Han Solo could have been a Jedi if he wanted