For a good start with the basics I would suggets you study for the Net+ cert. It’s a great place to start and a good certification to have.
Comptia is a hardware independant certification. I don’t completely agree with a Network+ because it isn’t very respected in the networking industry. Cisco and Juniper are big names in networking and everybody respects a CCIE. Juniper certificates are good, but they only apply for companies with Juniper equipment.