You are talking to him as if I was a terroristParrot has an install option. If you're running it live, it's generally considered more secure, it's naturally going to run slower than it will run if it's installed. However, there's a finite value for security and you're probably (nothing personal) not all that 'rich' a target. Unless you're keeping nation-state secrets, you need to decide how much security is worth the effort.
At one end, there's zero security - which is just plain silly but we're expressing it for completeness.
At the other end, there's complete security - which means not using a computer at all.
Somewhere between those two extremes is where you need to pick a spot. Installing the OS will make it run much faster and not alter the security all that much so long as you continue to keep security in mind.
Can you access my device?You may need to use a partition manager from a live USB instance to wipe the existing partitions from the drive to create just one single, unified partition - preferably in ext4.
You should be able to Google all these things. I don't mind answering - but it'd be a heck of a lot faster for you.
If I could do it for you, I would.