Applying for first internship?

I’m in my second year of architecture and i’m planning on applying for internships for summer since i need the experience to get into a specific masters program. I’m a full time student and unfortunately have no experience in the industry other than designing and building a nursery for a small town. any advice on what i should put on my CV? and how many projects should i include in my portfolio? any advice regarding internships would be greatly appreciated. Thank you!