sccm deploy

Question

Hello, I work in a company with multiple forests, related to each other with a two-way trust relationship.

In one of these forests, I have a sccm installed and the idea is that it be the main site, from this main site it should hang secondary sites in the different forests that we have in the company. To centrally manage the entire infrastructure, without consuming unnecessary bandwidth on WAN links. I have no experience with sccm and I would like someone to guide me in the right direction.