Ok, can you share where her reading ability is currently? Here are my thoughts (mom of 10, always homeschooled, graduating our oldest next year and kids range down to an almost 4 month old baby):
Reading has 3 parts:
1. learning to read words through sounding out/understanding the rules for what letters say, recognizing some words by sight (especially the small helping words like and, the, to, he, she, that, will, etc.)
2. Reading fluently – not needing to sound out most or all words. This comes with lots of practice. Some kids need to work on actually memorizing certain words that they see frequently, while others pick that up naturally. I have 3 kids in ‘beginning reader’ stages right now. 1 has just moved to chapter books and still sounds out the occasional word, a couple per page probably. One knows most of the rules for how to sound out words and needs to start memorizing some words to recognize on sight to help his fluency along. He hasn’t done this naturally so we’ll start reviewing a couple words per day on flashcards, adding a new word to the stack as he masters a word. The third is still in the learning the rules for sounding out words phase. He’ll just keep trucking along there for now.
3. Reading comprehension – This is understanding what is going on in what you read. It can be done when you are still sounding out most words, but really is hard for more than beginning reader story books. For chapter books they need to hit that fluency stage of reading before they will have much reading comprehension. (However, if you are reading aloud to them their reading comprehension will be great for that, because you are taking away the hard work of reading. We do a mix of both for all ages at my house, them reading and me reading aloud.)
You can’t hurry them ahead in some of these stages, but you can actively work on focused areas to help. For example if she needs fluency still then choose word families that are used a ton and practice those every day outside of reading time, on flashcards. You can choose tricky ones like the -igh/-ight words so those become automatic, or you can choose basic ones you see all the time like:the, and, an, as, if, is, in, out, two, to, too, he, she, me, we, that, this, these, there, those, you, your, on, for, but, can, all. Dolch word lists are free online and they focus on having kids learn most frequently read words. If you start there, you are giving them automaticity in words they will see in nearly everything they read. This is a step to fluency, to making reading without sounding out happen. Again, some kids develop this on their own over time, but some benefit from direct practice.
For everything else (grammar, spelling, etc) – relax. In today’s world spell check is a reality. Choose 1-3 words per week that you see consistently spelled wrong by your child and have them practice those as nauseum until they can spell them in their sleep. Then add a new 1-3 words. It’s short and slow and steady. You still have 5 years to graduation! A lot can be mastered in small chunks in 5 years. And think honestly, are there words you still have trouble spelling as an adult? I think that is normal.
There is a free online grammar website called Daily Grammar if you really want to use it.
In subjects where knowing how to read isn’t the point (like science, history) use audio books or read alouds. She can comprehend and learn without the added struggle of just reading the information. (Even programs like Apologia science have audio for their textbooks, or video lessons).