There's always gonna be negative Nancies...
If no one spent time with young trees.. a great number of the incredible bonsai specimens we HAVE in existence would not exist..
It's super easy to BUY a decent starting point... way more "badass" to spend 5-10 years training a seedling to that starting point. (IF you have that kind of time)
Buuuut.
.
The ONLY reason to have an oak bonsai is because it should look like an oak, the older the better. Ancient being the best. That means starting on the journey with trees that already have some actual age...
THIS is true...
I'd recommend looking around.. find a 3-5 year-old oak.. a damaged, stomped or partially eaten one..
Collecting seedlings is fun..
But collecting interesting TREES will attain much quicker success..
And Oak IS one of "those trees" Rockm is absolutely right..
I just disagree with discouraging people from
becoming engaged in the "first portion" of tree's lives.... It's important to understand all ages, in my opinion.