Can I use a sentence in small ternary form, or should it be only with periods?
Also, is there some place where I can put my analysis and be reviewed? Can I use the forum for that?
The sentence is allowed.
The forum would be a good place for that. You’ll have to upload a PDF and then post the link. It also helps to have an audio file to hear it. If you can’t do the audio, music xml format is handy because all the notation programs can open it.