Multiple Linux Distro Installs

Hello,

I have been using Ubuntu (Dual Booted with Windows 10) for about a year and have never needed to use Windows (what a messy system compared to Linux). Unfortunately as this was my first venture into Linux my Laptop SSHD is a bit of a mess (general Windows filling it up, bad partition, etc). 

Therefore I have just purchased a new internal 2tb SSHD which I am going to install with the idea of having a few different Linux distro's installed. My thoughts currently are for Bodhi, Debian, Fedora and possibly Arch, of which each distro will have its own partition (a rough 500gb split per partition). The idea is for me to really learn the workings of various Linux distro's as I am looking at doing the LPCI-1 and further qualifications in time. Currently I am studying Java and Python so they will be used for this, along side all sorts of other varied usage. 

However, given that I have not attempted this before (other than dual booting with Windows - which was easy) , I am looking for any help or pointers to make sure I do not forget to do anything that I need to do, and also to not do anything I shouldn't. 

So hopefully there as some nice people on this forum with more experience than me to help make sure I do not make any stupid mistakes when looking to do the various installs. 

Kind Regards

Paul