Once you have gathered all the details. You need to contact people either by email, Linkedin or even by phone or in-person (if you dare, I personally never did, but it is highly efficient especially for small companies!).
The objective is to contact potential future line managers to ask for a networking interview, either in person, in “normal times”, or via Skype or Zoom in “Covid times”.
It is essential to explain your approach, what you are expecting from the encounter: maybe advice, contacts, information on the industry or feedback on your profile.
NEVER ask for a job either at the initial contact, during and even after the networking interview. The interviewee knows you are actively searching and asking for a job will only put the other person in the shoes of a recruiter, not a person who will give advice or contacts. If a job opportunity matching your profile comes up along the way the interviewee will remember about you.