What's better, a Techinal School or Institute, but Im in high school?

I would say Institute, they're much more advanced, better trade (trades are varies depends what you want to study in) Flexible class times: day or night classes, better instructor, Hands-on education, Accelerated program, Job placement assistance right after graduation.

For Example, im a present student at Redstone Institute which is also know as Westwood College. Redstone college is for Construction and Aviation (Airframe Powerplant) Technician. There are only 3 which Redstone is located at Los Angles CA, Houston TX and Denver CO.

Did you just begin or are you like a sophomore??

A Tech School is career prep high school, where they teach you one a trade that you can start doing right after you graduate, and it still gives you all the credit of a highschool.

An institute is basically the same thing but its after high school and is more of a college.