So, you can't write Vala issa kepa, "to be" equivalent goes after the noun...
Yes. The verb comes at the end of a sentence (or clause) in High Valyrian.
issa means happy so why is issa among the sentence?
No, issa means "is" in this case. Kirine means "happy".
Issa means is
Okay I get it now. Can someone please help me practice my High Valyrian