Because im a clean freak xD i want to clean my inside of my laptop ( not inside inside , inside as in the parts you can get inside easy) .Will cleaning the laptop make the laptop last longer, run faster or anything like that? Or even not get as hot.

Yeah, computers are designed in such a way that the fan blows air over components that need to stay at a certain temperature. You can think of it sort of line a line of air swiring around inside your computer. If something blocks this stream of air, in this case dust, components can get so hot that they literally burn out. Those little dust blower things are great. I clean mine out every 3 months. It’s fun to get into all the little cracks and shoot big clumps of dust out.