How should I utilize my internship money, and what does it mean when taxes will be withheld from my stipend?

Hello, I am a 19 year old college student participating in a summer internship this summer. It will be for 8 weeks and I will be paid $8000. This is my first time really dealing with money. I took financial literacy in highshcool, but that was 5 years ago. I currently have $2000 in my savings account prior to this internship

So far this is my budget:

Money Left after spending: $2,274

Savings 4000

Food 300

Transportation 226

Clothing 700

Mom 500

My mom is paying for housing, so thats why it is not included on here.

On my offer letter for the internship, it says this:

You will receive a

stipend of $5600 over the in addition to a housing allowance of

$2400. Please note that taxes will not be withheld from your stipend or housing allowance.

I dont understand what the last sentence means. My friend says it means I need to file the taxes on my own, and save some money from the internship t o pay for taxes, but I have never paid taxes before. When I searched it up, Google said you had to make over $15000 in order to pay taxes, and this internship will be my only source of income for this year.

My main question is, how should I use the money for this internship, and what does that sentence mentioned previously mean?