"Pagtatanghal" means "presentation", but refers to shows or programs.
"Pagpapakilala" is what you should use to mean presentation/introduction of a person.
"pa rin ako sa pag-aaral..." = ?
"tuloy/sige pa rin ako sa pag-aaral" = I'm still continuing with my study/studies
"nag-aaral pa rin ako" = I'm still studying
"nag-aaral pa lang ako" = I'm just learning = I'm just beginning with my study/studies.
Ang pangalan ko ay Deise = Deise ang pangalan ko = My name is Deise