Overthinking kids first rifle; .223 or bigger is better

[jackknife88]

I have a 10 year old kid who wants a rifle to mainly hunt deer and targets within 150 yards. They are small and left handed. My thought was to start them with a LH tikka in .223. BUT all of the smaller caliber thought is predicated on good shot placement and how a lower recoiling rifle enables accuracy. This kid will be learning to shoot, so won’t be threading needles for a while no matter the caliber. Would a .243 be a bit more forgiving on game animals for a beginner? Still seems like manageable recoil. Or- will even a beginner be a better beginning shooter with a smaller caliber?

In the SouthEast (USA) here, CVA scout with 300BO or 350Legend (preferably suppressed) has been the go-to for most guys with little ones. Ask 9 guys, you'll hear 10 opinions so take it with a grain of salt.