Yeah, it's really rushed. I don't really remember the beginning that well, but it's supposed to be really slow paced and detailed. I don't mind cutting unnecessary details, but the protagonist immediately understands that he's been transmigrated and quickly grasps the situation.
The direction also feels really lackluster. For example, in chapter 2 right after his sister leaves he just randomly appears on the street with new clothes, going out on his errand. Could've shown him getting dressed, getting his keys (and remembering that with Klein's memories). Right after he already appears on a shop, doesn't show him walking up to the shop or recalling something from his memories, so it just feels abrupt since there's no build up.
Anyway, doesn't look like a great adaptation, though it seems these first chapters might be a pilot (?) and they improve on that later on with feedback.
Actually, if these 3 chapters are just some kind of preview it'd make a lot more sense. Hopefully that's the case, since it just keeps jumping from event to event without showing anything in between.