I'm so tired of the narrative that Luke was a whiny, useless twink before his aunt and uncle were killed. I've seen a lot of people saying, "Leia was in the senate, leading top secret Rebellion missions, etc., while Luke was whining about power converters and playing with toys."
This is such a bad, low-level take.
Leia was a literal Princess. She was raised in luxury. She was well-educated. And her parents were already an active, secret part of the Rebellion before she was born. That's why she was given to them. Yes, Leia has a fiery personality and wanted to be involved, but she was encouraged and prepared specifically for that role.
Luke was raised, if not in poverty, at least in a low-class life style on a Hutt-controlled slave world. He was raised, perhaps begrudgingly, by a non-blood related aunt and uncle who, above all else, wanted to protect him and keep him safe. They wanted to make sure he didn't follow the ways of his father. One of the ways they did this was to keep him busy with farm work. To keep his head out of the clouds.
And nevertheless Luke had a best friend who immediately joined the Rebellion once he got off world, and who Luke deeply idolized and wanted to follow.
He isn't "playing with a toy" because he is still childish; he is daydreaming about being in that Skyhopper and fighting the Empire. He wants to be out there doing stuff, but he's been raised to obey his aunt and uncle. He feels obligated to stay and help on the farm. You can see why--they are poor, they are struggling, his aunt and uncle are old. They need Luke to help, or so he believes. Luke is maybe too kind and puts the needs and desires of other people in front of his own, but he's not some useless kid. And it is very clear, from ANH as well as the Obi-Wan Kenobi TV series, that Owen especially wanted to protect and shield Luke from his heritage. (Whether or not that was right or wrong is another debate, but you can't blame Luke for it.)
Luke is desperate to be out there doing it, but he is blocked at every turn until he's forced into it.
