Yes, you only have one device (according to what's written on this topic), and to do a decent test, you need multiple devices.
So, a simulator can help. You're not being given random advice.
I installed EVE-NG on VMware at home. Can I build a system on EVE-NG by myself?
Did you even attempt to google your question?? If you want to be successful in this business you will need:
a. training and thats why I advised the free MTNCE courses Network berg has,,,,,,,,,,
and
B. be self-motivated and dont expect too much spoon feeding!!!
https://www.youtube.com/playlist?list=PLJ7SGFemsLl1ZSsdcdYqeCFDM71dz97XS
contains a number of videos to get you started on EVE NG
Thank you
Learning MikroTik is not easy. What is your native language? Maybe you can find some youtube videos in that language.
I find watching technical youtube videos that are in another language of limited use, because while I can see what they are doing on the screen (if they did record the screen), but I can't understand their explanations of what they are doing.
Getting professional training in your own language would be the best.
Otherwise having multiple real reouters (they can be small ones, like the hap ax lite or hex s refresh) Having at least 2 real routers gives you experience with phyiscal issues. A simulator is good, but its leaning to drive in a simulator, and not experiencing problems that are related to bad battery or a flat tire. A router simulator doesn't emulate poor cable, etc.