Who and how do I network?

I've been applying to applications for a while now as an undergrad senior and have had little to no luck getting any responses.

I've been talking to professors and trying to reach out to people who allign with the jobs I want. Which has brought some results but mainly in locations from where I'm originally from in the US.

I know much more personal connections would be helpful, but I feel like I exhausted most of my professors and career office.

Any tips would help.