An important question to I begin

Hello, I'm new at this world (hacking) and I want start my career supported by a great experience with the right OS (kali Linux). I have a computer with windows 7 but I can´t delete him cause its the pc family and everybody use, so I thought install a VM and run kali linux but then I noticed that I want to practice against a lot (some of them) OS. Runnig a windows 7, a VM with Kali linux and maybe another OS in the VM is a disaster to my poor pc RAM, so my question is the next: Can I install kali as a dual boot aside with windows 7 and then within the kali I install a VM? Thus my RAM just have to handle with kali and a VM, instead windows 7, kali linux and another OS.