Here are a couple thoughts - I am LH, and my wife is small (shoots a youth gun)
Most bolt actions in RH are fine to shoot LH - what you want to look for is no palm swell or curved stock features that cater to RH. You also want a top tang safety - it's operated with your thumb and works for RH or LH (same advice goes to shotguns - bonus points to mossberg 500, and browning bps for tang safeties).
I actually like shooting RH guns with top tang - with a front rest (bipod, pack, etc.) you can keep your left hand by the trigger and use your right hand (which is normally on the forearm) to work the bolt, it's super easy, and you can actually keep on target better between shots than you can when operating a LH gun. Second, since the chamber is on the right side, your right eye is now able to clearly see it without moving your left eye from scope position - great for visual feedback when action is open, i.e. making sure there is/isn't a round in the chamber or stuck or something.
As far as youth guns - I got my wife a ruger american youth, it's a straight stock and top tang safety. That thing is so light and fun to shoot I end up taking it half the time, even tho it's RH. We put a vortex diamondback 4-12 on it, and with the deer season XP ammo it's shooting 5/8" groups at 100 yards. Super light, fun and easy to shoot in .243. It's so nice that my brother got the same setup for his gf, and other friends have done the same. All-in I think the package was low $400s, and the deer season ammo is cheap and shoots great (for deer and smaller things).
Not sure if Ruger makes an american youth rifle in LH - but I'd recommend you check them out either way. Growing up LH and shooting RH guns a lot is just something most of us have to learn to do, and honestly I almost prefer them because you can work the bolt while staying on target and you can see if a round is stuck/chambered while staying on target.