We got a 9 week old earlier this year, like you having always had cats but never a kitten.
We were told to restrict him to one quiet room initially.
We have a stupid new build that's a bit too small for all of us. We don't have a spare room or anything. So he started off in the lounge-diner which I hate and had to get used to us being around.
We left the cat carrier box in with him for the first few weeks till he got comfortable sleeping on the sofas/in the bed on the cat tree.
We got a bunch of cheap toys from Amazon and played with him, and sat with him, and talked to him.
We had his food, litter tray and carrier all near (but not too near) each other initially. Then gradually moved them to better spots in the room.
After a few weeks we let him explore the rest of the house. A few weeks after that we started moving the food & litter trays towards their final homes. Literally a meter a day! I didn't want him losing the litter tray!
And eventually (I forget exactly) but a few weeks after neutering & microchipping, when we were all home for a few weeks we started letting him out in the garden - always BEFORE food so that he'd come right back in to eat. And then gradually increased his outside time. Used treats to teach him how to use the cat flap. Kept him in overnight for a good few months.
But now he's nearly 9 months and is currently zooming around the house & garden like a crazy thing. He's 'made friends' with the other local cats (goes next door to hang out with the neighbour's old lady cat).
We did use a bit of foil & water to teach him which surfaces he wasn't allowed to jump on.
The major warning though: you think babies grow up fast - kittens grow up in a blink! Take LOTS of photos while it's tiny!