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i was homeschooled for 4 years, and my sister was homeschooled for two. the local schools refused to allow us to participate in activities like band, track, or any of their clubs. there were no homeschooling groups in my town, meaning there were no social outlets for us. we were essentially isolated from kids our age for the duration of our homeschooling.
however, i was a near straight-A student during homeschooling, and i am currently a straight-A 4.0 student in high school. i took the ACT for the first time in october 2014 and scored a 27.
your homeschooling experience depends on where you live. if you're in a big city, then it's easy to maintain an active social life because there are schools that allow homeschoolers to participate in extracurricular activities and there are groups for homeschooled kids. but if you're stuck in a small town an hour from anywhere, you're stuff out of luck unless you hump a bible and attend every church in town.