Installation of three wasps on one PC. What is needed?

Question

Operating Systems

For experiments, it is required to install three axes on the laptop: win 7, nix, and android.
Need advice.
Hard 300gb. How best to split, with what format and volume?
Now it is broken: into three parts, 100mb hidden Windows, 97GB Windows system, the rest is not broken.
It is necessary taking into account one section for all wasps.
Which bootloader is better if there is already wine 7, and you can’t demolish it.

Answer 1

Set GRUB as bootloader.
Linux is enough for 60-70 GB per eye. Android even less.

Answer 2

Why not work in virtual machines? Set Linux as the main system, and let the rest run in virtual machines under libvirt + kvm