I really want to get into New Frontier but I am not sure if I would be able to finish it.
What's the problem? It is a series with a meta-storyling but aside from that, the adventures can be read independently. My first NF book was Treason
and I had no problem getting into the midst of everything.
So, it's no problem to start and not finish. It is your entertainment, your pleasure.
Btw, here is the depiction of a male Thallonian, from the German publisher: