Don't worry about typos too much, they are a sign that you are intelligent.
Psychologist Tom Stafford, who studies typos, explains the problem in a article:
The reason typos get through isn’t because we’re stupid or careless, it’s because what we’re doing is actually very smart, explains psychologist Tom Stafford, who studies typos of the University of Sheffield in the UK. “When you’re writing, you’re trying to convey meaning. It’s a very high level task,” he said.
https://medium.com/@OnSecondThought_27622/the-psychology-of-typos-985d5a391853
Why You Should Hire People Who Make Typos
The best people for certain jobs may not have perfect résumés. Oh, sure, they'll have the skills you need, but you might spot a "their" that should be "there" or vice versa. Many hiring managers reject such people on the spot. Research suggests that this may be a bad idea.
Typos are made because we're so busy trying to convey meaning that we don't always notice when we've made an error. We all know that it's difficult to catch our own typos, but why is that? It's because we already know what we mean, so our eyes read one thing but our brain translates it into the meaning that it already knows exists.
https://www.inc.com/suzanne-lucas/why-you-should-hire-people-who-make-typos.html