Questions on Kobo [Interfered with another thread topic]

Hi,

I'm new here and found the forum looking for information on Kobo readers.
I have an older Kindle Touch.
It's OK but I'm looking for a lighted screen
and the larger screen of the Kobo Aura HD/H2O appeals to me.
I also have a large library of epub books I would like to put on a reader.

I live in Hawaii and I'm not clear on Kobo marketing.
Are they available in the US?
If so, where to buy?
Is the H2O the best Kobo to get?

And finally, what is involved with side-loading epubs from a Mac?

I realize these questions may be answered elsewhere on the forum
and will appreciate redirection to other threads if that is needed.

Thanks for any help.

Aloha, Stephen