Are you unhappy with the new editor like myself and 1,000s more, read on.
If your posting an article or editing an existing post their are two ways to make it easier, and miss the new editor to use the old one which is easier.
If your posting a new post, go top left in the dropdown click WP admin, down to posts and over to add new, you will be in the old editor ( classic editor ) you can do all you want there.
If you want to edit a post, go top left in the dropdown click WP admin, down to posts and over to all posts, you will be the old editor ( classic editor ) it is easier to edit there.
There is an auto app you can install but its to difficult for me, so I think you should leave it.
