That is really uncomplicated so don’t bother about getting it “right”!
Think about the examples that are first for casual circumstances.
The 3rd one utilizes quite formal vocabulary and may be conserved for extremely refined circumstances.
Se llama… (His/her name is…)
Permiteme presentarle a… ( i’d like to to… introduce you)
You may want to indicate the relationship you have to that person after you introduce someone. Some vocabulary that is basic allow you to get during that!
Este es mi… (This is my…)
Novio (Boyfriend) Novia (Gf)