If you aspire to be a networking engineer, you should have the sufficient theoretical knowledge in that particular area.

To acquire this knowledge there are a lot of institutes that offer courses in networking. The best thing is getting CISCO certification for it. Cisco certified network professionals are highly paid and they have the necessary skillset to become one.

Try familiarizing yourself with the concepts of Internet addresses, Proxy, Routing, Network traffic and so on.

Check:How to become a Freelance Network Consultant?