Make use of
https://talkimg.com/. Upload the image there and paste it on your post. You can adjust the height and width.
I welcome you officially to the forum, knowing how to add images to your post is good at least it illustrate or showcase a practical understanding of what you are talking about, but I suggest you concentrate more on your writing skills, reading more of other people post because that is the key and fundamental thing that can grow your account. Thanks you.