I’d have a look at something like an Udemy CCNA course, but stick to the generic stuff, and skip the Cisco-specific things - this should get you enough of the b

I’d have a look at something like an Udemy CCNA course, but stick to the generic stuff, and skip the Cisco-specific things - this should get you enough of the basics that you can pick up the rest. Udemy is good here in that you can pick & choose from the videos.