The English name translation of "Li Nina" is the same as Pinyin:

Lee, Nina

In English grammar, commas are used to distinguish surnames from first names.

Generally speaking, to introduce yourself is to say your name first, and then your surname is Li.

li nina

(When the first name is written before the last name, no comma is needed. )

If you want to choose another homophonic English name, you can consider: Lina, Lea, Nina, Leah, Liliana.