@anonymous_user_7c6c0024 Hi,
you can either migrate the related resources from other sample project you’ve studied,
which contains 1st person controller and its BP_character,
you also need to import the project input settings (ASDW etc.)
or simply created the new project with the 1st person template
and then copy your model into it.
I strongly recommend you can sign up and enroll the free lesson in learn.unrealengine.com website.
and then search for the title: “Welcome to Architectural Visualization”
This tutorial will teach you how to create 1st person game environment and rendering knowledges.