It usually takes about 5 years for a seedling to bloom.
There are ways to cut that time down, you can research that point on this forum. Longriver knows, but I don't.
See what it looks like by the end of next summer, you should be able to tell if it is a camellia.
Congrats on your seedling babies!
Now, be patient.

5 years is a long time to wait to see if they are going to bloom true. I have another question. Is it normal to find camellia seedlings under camellia bushes?

Dear kal2002,
Yes, it's common to find seedlings underneath sexually fertile japonicas and sasanquas, i.e., those that produce single or semi-double blossoms.

If, by saying "bloom true," you mean that the seedling is identical to the parent, that is generally not the case. Like human children, plant children differ from their parents.

Thanks, jay. Since it takes so long to see a flower on a seedling, I wonder how many people keep the seedlings.

Found the thread if your interested.
Longriver grafts and it shortens blooming time by a year or two.

Here is a link that might be useful: Camellia grafting of seedling

I usually gather a few sasanqua seeds after they ripen and then play Johnny Appleseed by planting the seeds in out-of-the-way places where they can germinate and grow undisturbed. Camellia seeds germinate as easily as garden beans. Years ago, I planted sasanqua seeds along a steep terrace; and today, those seedlings are large shrubs. Most are pink. A couple are white, and there are a few japonicas mixed mixed in with the sasanquas.

Camellia x vernalis 'Yuletide' is itself a chance seedling (of 'Hiryu') originating at Nuccio's nursery in California.

Hi kal2002 I sent you an email. Thanks Brenda