CCNA is better than the Net+. What exactly were you having issues with the labs? I haven't used GNS3 in a while but I might be able to answer your questions.
It was probably David Bothal, I bought his Udemy course a while back... GNS3 the Layer 2 and Layer 3 routers and switches... I had a issue where I couldn't get the proper layer 2 switch in there.
Here's what I got.
Cisco CCNA / ICND1 (100-105) Complete Course: Sims and GNS3
Basically I got all the GNS3 images, I got the VM set up and all that but the layer 2 switch keeps on booting up without turning out, I did get a few routers working but a lot of the command David used wouldn't work on the simulation software.
I downloaded Free Packet Tracer so I'm gonna do that to get through the CCENT, for the CCNA I'll probably go back to GNS3.
So I should be good for now, and I'm not gonna do the N+ again and just stick to the CCENT.
I was looking for this
cisco iosvl2 15.2.4055
I couldn't get the proper image... but I don't need that for now.
EDIT
I figured it out, I got the switch set up...