I'm 18 years old and in my first year of computer engineering.
I want to now what my career path looks like. I mean as a person who is going to have their bachelor's in C.E.

Also, can I get a diploma that will help me? What can I do to improve my reseme?

It depends on which computer engineering sub-field you want to specialise.
Come what may, early certifications in CE related courses will be of great help in given you headways in this field especially if your from Africa.