I am surprised it has taken you six weeks to find us, but welcome aboard LQ!
Don't worry about being "dummy" - we all started there: but we read, learned, used and liked. That's why we are still here
Of course you can multi-boot many linux distros happily, but some knowledge of partitioning your disk(s) is needed, as is some insight as to how your bootloader (probably grub) works.
I suggest you search this board for "Dual boot" or "Triple boot" or "Multiboot" - there'll be plenty of threads for you to read and learn from.
The LQ member Saikee
has some very useful booting links in his Sig. Search for his posts (Search link is above).
Then, backup your vital personal files, and try it
Come back here if you get stuck.