What is the main conflict?

My answer is: poverty and discrimination.
My question is: can I add achieving dreams as a main conflict?

Yes.

Yes, you can add achieving dreams as a main conflict depending on the context and focus of the story. However, it is important to note that conflict in storytelling often refers to the main problem or obstacle that the protagonist faces throughout the story. Poverty and discrimination can certainly be the main conflicts if they are central to the plot and drive the narrative. On the other hand, achieving dreams could be a theme or a personal goal for the characters, but it may not necessarily be considered the central conflict unless it directly opposes or intertwines with poverty and discrimination. Each story can have multiple conflicts, so it's possible to include both poverty and discrimination as well as achieving dreams, as long as they are developed and interrelated in a meaningful way within the narrative.