Hello,
There are plenty of free resources to include CISCOs site where you download packet tracer that teach you how to use it.
If you are looking to get into networking I suggest you buy one of the CCNA Official Certification Guides by Cisco Press as they have links to CCNA labs that will help you practice and understand concepts.
This will help you learn the information in a clear and concise manner rather than just piecing things together every time you have a question or need help. Not to mention there are lots of groups and communities like Discord (Cisco has a group as well) to join and to ask just a quick question and get info faster than a forum in my opinion.
-David