My Personal Take Oon Growth

The word "on" is a preposition, which is typically not capitalized in title case unless it is the first or last word. That's why it should be lowercase in the title.

When you become capable of doing things that you couldn't do before, it means you get to see a view that you've never seen before.

Adding "that" before "you couldn't do before" makes the sentence flow more naturally. "That" is a relative pronoun that links the clause to the noun it modifies, which is "things." The second part, "you get to see a view that you've never seen before," is also better with "that" because it introduces the relative clause describing the "view."

Thatis is what growth is.

While both "That is" and "This is" can work, in this context, "This is" feels more immediate and personal. "That" sounds a little detached, while "This" gives the sentence a more direct, introspective feel, which matches the tone of the rest of the text.

My Personal Take On Growth

This isn't too important, but most style guides recommend not capitalising short prepositions such as "at", "by", and, of course, "to", unless they happen to be the first word. It's a minor thing though, so I left your writing as it is.

When you become capable of doing things you couldn't do before, it means you get to see a viewperspective you've never seen before.

I understand you, but I think this word fits better