contacts-project plugin?

[i have no idea where to post this]

So i’m currently on an internship at a small design compny.
The company is build up from internship-ers(?) taking jobs(?) from people who want/need websites/logo’s ect.
So the knowledge of each intern varies.i my self do have a share of coding knowledge,but i’m not a php/java guru and never made a plugin.

I got asked to find and figure out a plugin(s) that would let us do this:
[the goal is to have a projects database with contacts and attachments]
Possibility to add contacts and be able to update them.
Add the project description/form to it.
and be able to attach attachments to it.

We are trying to digitalize our projects and the clients information.

kinde like this:

-Contact information
-who is working on the project(we are interns,so the database needs to be editable)
-Project description
-progress of project
-attachments(tender/offer?file,invoice file,images and other related files)

is there a plugin or plugins that can do this?
I have googled,but using the term “contacts” only gets me forms.

any lead or help is welkome