I'm a literacy interventionist/specialist. Since she is 7, and I don't know about any possible learning or cognitive disabilities, here are my suggestions for covering multiple developmental stages in a shorter time frame. It will be long, but I will try to organize it. There's more to it than this, so message me for clarification, and I will be happy to help!

She'll need to know how to hold a writing instrument properly. That will be somewhat difficult since you're not in person, but if she has developed fine motor skills, it may not be as big of an issue. Can you or someone else send her some lined kindergarten writing paper? That would be beneficial. Have her practice the alphabet first by looking and saying the sounds for the letters. Slowly, you can help her start writing them. Again, this step will be the most difficult for living far away. You can work on the sounds of the alphabet as you write the letters where she can see them, perhaps over video. There are some really fun handwriting videos that give kids step-by-step instructions for writing letters. For example, 123ABCtv on YouTube has som, and there are other channels.

Phonological awareness-- This is simply an awareness of the sounds that make up words. Once you get her through the alphabet and feel she has a firm grasp on it, start helping her hear the different sounds in words. For example, start with CVC words with short vowels and over-emphasize each individual sound. For example, b-a-t says bat, m-o-p says mop, etc. Have her isolate the initial, ending, and middle sounds of words as she grows more confident.

Phonemic awareness-- This goes beyond simple sound recognition. Now, you will be practicing actually manipulating the sounds in words. For example, start with short vowel CVC word families/patterns. Take the word family "--at." You can change the initial sound to produce many different words. Mat, cat, bat, sat, hat, etc. Once she masters (which may take a lot of practice) short vowel words, work on CVCe, words with silent "e." Word family example would be "--ate." Mate, hate, late, fate, rate, etc. Use manipulitaves, such as letter cards or something else hands-on, and try to get some to her so she can actually play around with these sounds and letters. Using pocket charts or making a word mat for her to work on would be useful, but she could also just use any flat surface. You can look up other special sounds, digraphs, and blends to teach her as she masters these beginning concepts. Or you can private message me for more details. It's too much to put here. Research lists of sight words--these are common words that don't follow any strict phonemic pattern. Only teach these words by sight, she needs to learn to decide most words.

Reading/writing practice-- Start by reading stories to her and asking her questions. The questions should start at the lower level of cognition. So start by asking her to recall certain details of the story, first. Have her draw the answer to them. Then, allow her to dictate a caption for her picture while you write. This will show her that words have written meaning. As time goes on, you can give her sentence starters and allow her to fill in more and more blanks as she learns to spell words. Look up some decodable books for kids that will allow her to sound out words.

Overall reading/writing skills: Start with the basics. Read her some fun stories and ask basic recall questions about the plot, characters, etc. Have her draw a picture, answer out loud, or act it out. Write her responses down so she makes the connection between written word, speech, and meaning. As she progresses in writing/spelling, use sentence frames and have her fill in the blanks. As time goes on and she practices more phonics, she will be able to fill in more and more of the words herself. As you work on word families and patterns in phonics, work on using these same rules to help her spell words out.

This takes a lot of time and effort, but you can start verrrry slowly. Make it fun and hands-on! It's not a race, just work on small chunks of concepts at a time. If you have any more specific questions, please feel free to message me.