Hi {studentfirstname},
We are very excited to welcome you to the team! As agreed upon your first day will be (start_date). We expect you to be in our office by (start_time) and our dress code is (business_casual/professional). 
 At (company_name), we care about giving our employees everything they need to perform their best. As you will soon see, we have prepared your workstation with all necessary equipment. Our team will help you setup your computer, software and online accounts on your first day.
(If applicable mention parking, and anything extra for new hires.)
For your first week, we have planned a few training sessions to give you a better understanding of our company and operations. We will also have your employment paperwork on your desk, and you will have plenty of time to fill it out. 
Our team is very excited to meet you and look forward to introducing themselves to you throughout the week. If you have any questions prior to your first day, please feel free to email or call me and I’ll be more than happy to help you. 
We look forward to working with you and seeing you achieve great things!
Best regards,
(your_name)