There are many teachings out there, that look similar to Christianity and unfortunately some are even practised in our churches, to know the difference between what you should practise and what you shouldn't always ask yourself this does this glorify Jesus's sacrifice in anyway? An example is if you're asked to give in church, if you're giving money to Jesus/ the church for a blessing does it glorify Jesus I use this example because it says in the Bible that we have been gifted with all spiritual blessing so why do we give to the church for blessings, the reasons are the lack of knowledge and greed. Only give to help out the Church with projects or to help pay the pastor because he has no job apart from supplying you with the word, but do not ever give for blessings, your father God is responsible, he sent his son to die for your sins when you didn't even care about him. He doesn't need your money to bless you, give only in gratitude to God for what he has done not what you want him to do.
Another thing to help you differentiate is if the teaching tries to downplay Jesus and lift up other things that can help you. An example is holy water, oil, ornaments and things outside the death burial and resurrection of Jesus Christ. Remember that in the Old Testament animals were slaughtered and sacrificed to God to pay for the sins of Israel, you do not follow that tradition anymore because Jesus Christ took the place of that sacrifice and even went beyond. The same goes for most practices in the old Testament they have lost the importance because of Jesus Christ. Christianity is about Jesus Christ and no one esle keep that in mind. If it wasn't for him people like you and I who are not citizens of Israel wouldn't have a place in heaven he came so all of humanity could have a chance at heaven. You have believed in him so u are saved.
Also note that if someone tries to convince you that God is angry with you or that you won't make it to heaven because of something you did, it is not of God and is downplaying the sacrifice of Jesus Christ
Another thing to help you differentiate is if the teaching tries to downplay Jesus and lift up other things that can help you. An example is holy water, oil, ornaments and things outside the death burial and resurrection of Jesus Christ. Remember that in the Old Testament animals were slaughtered and sacrificed to God to pay for the sins of Israel, you do not follow that tradition anymore because Jesus Christ took the place of that sacrifice and even went beyond. The same goes for most practices in the old Testament they have lost the importance because of Jesus Christ. Christianity is about Jesus Christ and no one esle keep that in mind. If it wasn't for him people like you and I who are not citizens of Israel wouldn't have a place in heaven he came so all of humanity could have a chance at heaven. You have believed in him so u are saved.
Also note that if someone tries to convince you that God is angry with you or that you won't make it to heaven because of something you did, it is not of God and is downplaying the sacrifice of Jesus Christ