Welcome to the fora.
This one has ‘lollipop’ bearings. Those aren’t good and are best avoided.
This would be the better one to get.
Here’s a recent learning journal kept by a learning unicyclist.
And here is a link to the search function to help you find info on whatever you’re looking for on these fora.
If you can’t get hold of the info your looking for using that, start a thread and ask your question there. If you can use quite a descriptive title for your thread, that would be kewl.
Happy learning.
Keep us posted on your progress.