Have you watched the Natural Progression of Language Arts yet https://simplycharlottemason.com/learning-library/videos/ it might help answer your questioms, as well as the other videos on that page concerning copy work and dictation and all that.
I would not do grammar or spelling, continue with reading a loud and copy work, what ever he is comfortable with. At 7 one of my children was able to do a sentence or two of copy work, for another one word was about all he could do but he slowly worked up to longer selections.
For my children spelling did not improve until 5th or 6th grade, after years of copy work and then moving into prepared dictation, as well as maturity. I think maturity helps so much! Spelling is not the same skill as reading they require different skills just as reading to self is different than reading a loud. I think reading out loud and copy work are so good for spelling. I struggled with spelling my entire life, phonics never did make sense with all the rules and my mom believed likely a form of dyslexia, but I could read well. It was not until I was an adult and started reading to my own children out loud that my spelling improved. Reading those words slowly vs skimming when reading to myself really forced me to see each word. I am not a natural speller at all, it is still challenging, but has improved so much. I see the same in my children around the age of 11 they start caring more about their spelling and continue reading out loud and prepared dictation and things start coming together.
Some people do find that their student needs something different than copy work and reading out loud, but I would give it some time since your student is so young.