Hi @WarrWillow,
assuming you have a disk in your hands now, if you follow the Beginners guide, it explains everything step for step, please take time to read through it and things will become a lot clearer.
You can also take time to read though the Partition guide which explains various scenarios, take your time and don’t rush into everything, if you currently don’t have a disk that boots correctly, chances are that it was “burnt” too quickly and this contributes to errors at boot time!. The partition tool “Gparted” is already included in the live CD (gets removed once you have a done a full install!).
See also: Burn ISO’s at the slowest possible speed
When you post, keep it in small sections like the following please:
I booted and blah happened…
What types of partitions do I need to create and how…
My PC exploded after inserting Ubuntu Mate live CD…
I hope you get the general idea