I suggest looking into a homeschool group in your area, or a co-op. It is going to be different than what he is used to, and new friendships, if with other homeschooled children, will also be different. But they can be better!
It takes time to adjust to things. It will take some adjusting and time even for you to learn how homeschooling can be great for your family. Read as much as possible. That has been part of what I’ve done and God has given me a vision for our family and children and homeschool through much reading and researching as well as other things and much prayer.
Another suggestion I have is to make learning interesting to him, personalized. Give him plenty of opportunities to be excited and interested in learning. Don’t just do school at home, as in what a typical school does. Go on field trips, find places to go to for learning and make it sound exciting.
Plan a project that relates to what you’ll be learning about and tell him ahead of time that you will be working on once you get back. Let him have his own ideas and plan together, too. Visit the library and pick out good books, mixing in some books of his interest that you know are good for him to read and that he can learn more about a topic he enjoys and get him excited about it.
www.homeschoolfreebieoftheday.com has some great little resources from time to time that are fun. But you can look for things online, such as things for boys to build, young man’s handybook, american boy’s book of bugs… Some of those are book titles but they give you an idea of what to look for.
He has to have something to look forward to, something to be excited about. Learning and/or doing something(s) of his interest, even if you need to create an interest in him about something that is good and beneficial to him, will also carry him through the hard and not so fun parts of learning.
Homeschooling is a time for building a deeper relationship with one another and with God, and developing the character and interests and gifts/talents of each child. There is so much to do and be excited about and look forward to. You must look for it and keep trying!