Please don’t try and do this alone. You are not the only person trying to do this. It is not a competition. Don’t try to create all your resources alone. Don’t try and learn alone. Don’t try to find your resources alone. Make a team. At your school or with others.
There are tons of Open Education Resources (OER) out there you can use. It takes a while. And some deep searching… searching with a team will make it much faster.
Find yourself a few partners. You could also find some people to follow and work with on Twitter. Reach out to colleagues that you have met at a conference and ask them what they are doing. Start forming community. Share. Work together.