Hi there, Check out these resources for many free ideas, covering a broad spectrum of topics. Sign up for their email to regular updates.
At DIY Homeschooler we provide encouragement and resources to those homeschool moms paving their own way — tools for the homeschool handy-mom.
diyhomeschooler.com
New Homeschooler Boot Camp, 7 Step DIY Homeschool Planner, Lapbooks, Unit Studies and Homeschool How-Tos
www.tinasdynamichomeschoolplus.com
https://unitstudy.com/ is quite popular
We offer over 40,000 homeschooling and educational products at discount prices, while providing friendly customer service and homeschool consultants to answer your curriculum questions.
www.rainbowresource.com
Use the scope and sequence of 3-4 established curriculum makers to make sure you are covering all bases or use a list such as
http://www.oklahomahomeschool.com/checklist.html .
https://hecoa.com/ has a nice tool box and checklists for members, you can sign up for free.
Or you can use a book like this
Learn This by Charles Gulotta to help you out.
Good Luck and enjoy the journey!