There is no right or wrong on whether to blur your face. I have found over the years it doesn’t seem to make much difference either way.
I have found that some ladies are not sure how to blur their face. I personally use Photoshop to blur my own. There are a number of simple software programs that contain a bur tool. You should also be aware a number of the major advertisers offer this service at not charge. You can contact their representative or include when the request in you email with the ad content.
In addition many advertising sites have a blur tool in your account settings that you can use to blur or crop your photos.
It’s typically pretty straight forward. If you aren’t really very computer savvy. Don’t be be concerned over learning something new. It’s super easy. You got this!
Here is a previous entry on taking photos on your own. It’s a little outdated but still effective.
Best of luck!