Try it!! there is no right or wrong!! I am not a native English speaker either and held myself back from writing for a long time!!!
I really like the Grammarly app. Just so you know, here on Steemit, if you click on the correct version, it will replace it in your text for a minute and then revert back to what you wrote. So, you have to go in and fix it.
If you write on busy.org, the fix sticks. Don't know why....