Yes it looks like H. orientalis, and I don't believe it is an eft, it looks too large to be a juvenile. Theres a good chance that it is not CB too. Housing I would keep it cool, in a very shallow (approx. 1" of water) filled with plants like java moss with no dry solid land to get it used to the water. I would ditch the moss too, unless you want to test it to see if its acidic or not. This shallow tank can have a papertowel substrate or just be left bare bottomed.
Feeding I would suggest chopped or small whole earthworm or nightcrawler for the staple diet. If you try crickets, don't leave them unsupervised in the tank with the newt, the crickets could bite, and they aren't even that good nutritionally. You could try leaving pieces of worm in the tank in the dark and see if it eats any.
And when it is aquatic and healthy, a semi-aquatic tank is a waste, it won't use a dedicated land area often if ever. They are fully aquatic given good conditions, a permanent tank should have a minimum of 10 gallons of water, lots of plants, and just a small floating piece of land.