I think we can help you out better if you have specific questions.
I assume you are using the Contact Management starter database? If you are take a look at the notes tab, script, table, and relationsihp works. You can probably model the project list off of that as a starting place.
You need two tables.
In the client table there has to be a primary key field (such as an auto-enter serial number) for each record. Example pk_id
Ofcourse you can add all the other desired fields as well.
In the projects table you need a foreign key (example fk_clientid)
Now you can make a relationship in the graph from Clients::pk_id to Projects::fk_client_id
It will be a one-to-many relationship (one client can have more projects)
When you create layout from clients and you add a portal with the projects you can see de different projects for that client.
BTW is the Filemaker Training Series not usefull to yo? I'm trying it myself and learning every day.
I hope this is helpfull to you.