Can you be more specific about what information you need? Then I can give you a full answer! Would you like to know linguistically ( ie for university etc) or for language learning purposes?
But here is some info to start with:
A noun clause is a type of subordinate clause, ie it cannot stand on its own and is part of a main clause. There are different typ
In the sentene:"my plan is to amrry Brad Pitt.", there is no noun lause. a lause has to have a subjet and a finite verb. both are absent in the prvious sentence. how would you justify your stand?
I think that would be a noun phrase, not a noun clause, because the verb is in the infinitive. On the other hand "My plan is that I will marry Brad Pitt" does include a proper noun clause. (Though it suffers from being a particularly difficult plan to achieve).