Be sure to speak with your priest and your DRE to ensure that whatever you choose is OK by them. Parents absolutely have the right to instruct their children at home in the faith, indeed you are the first teachers of the faith.
Many parishes in Diocese require classroom instruction for Sacramental Prep.
Just schedule a meeting and see what the requirements are in your parish. They will certainly accommodate you as much as that particular Bishop permits.
Having said all that, one of the BEST things you can do for your child is to have them see you receiving Eucharist with love, reverence and devotion. This is an exciting time in their lives. God bless.