Not to complicate your life but if you’re going to take methyl B12, you also need to take adenosyl B12. Your body uses both kinds. It can turn cyano or hydroxy into methyl and adenosyl (unless you have an issue where you can’t convert it) but it cannot turn methyl into adenosyl. So you need a combination.
This is a nice combo
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1