Difficult question, easy solution.
There are a lot of ways actually to emulate the android background.
The problem is, my computer has quite lot of limitations.
So, I asked a friend, and said, ok, try again Android Studio!I said, ok, it can't harm more than other software.
So, I'm gone to https://developer.android.com/studio/index.html clicked the link, accepted their terms.
It's quite "hd expensive" but you know now hard disks are big and they can handle a couple of gb.
I will guide you for linux, cause for windows I think will be more like a click and next thingy.
After you download it, you extract the compressed file. You should find a file called: studio.sh inside the bin folder. Open it inside a terminal.
For lazy people: open the terminal, better if with sudo priviledges, write sudo and drag the studio.sh file inside the terminal and press enter.
Ok, now it will guide you through the installation of the necessary for the ide, just download everything it tells you to.
Now that is downloaded, open the studio, create a new project and then go to:
Tools>Android>AVD Manager
Ok, from here it's kind of easy. You will be prompted to create a new android machine, so create one, pick the phone you think it will suit your needs, and then it will ask you, which OS you want on it? You select which one you would like to try and it will be downloaded after. Then it will ask you the basics like, how much Ram memory to give it, how much SD space etc etc...
Attention: if you have a very old video card, use software emulation for graphic, or it will request to your video card too much power and your computer will just crash. I warned you, I experimented it.
after you finalized all that, click finish.
Start the machine.
Does it starts? If yes, no problems. If no, there is a workaround(and it's usually because it doesn't find your just brand new created machine.
Don't panic! just right click on your machine just created and View Details. It will tell you where it is.
Ok, now, go there, and you need to copy that machine and the ini file of that machine in another directory, which is in home.
In my machine for example is: /root/.android/avd/blablabla.avd
It will have to be copied to, like in my example: /home/wisehammer/.android/avd that's where it goes the android machine and the ini.
Now try again! It works!
Since it doesn't has a real play store like most virtual machine does, you can simply download the apk from a safe source like APKPure and then after you download it, you drag into the machine, and the OS will install the program. If it fails to install it may be incompatible with the OS you picked.
I found a shortcut for not opening it(If you dont need to install anything after, and it is:
In the terminal, write sudo then paste this(fix the name of your android machine you have set
/root/Android/Sdk/tools/emulator -netdelay none -netspeed full -avd blablabla -gpu on
It will open the android machine without opening the android studio. Enjoy!
If you have questions, comment below!