Grammar is the backbone of language. It gives it shape and definition, boundaries and rules.
So trying to form Spanish sentences around the English grammar in your brain is like dressing a cat in a tuxedo. Cute, but pointless.
The common mistakes that we all make while learning to master a new set of grammar rules are natural and unavoidable. You have to flail a bit before you can swim like an olympian. The good news? You will get there eventually.
How can you learn to work with the new grammar without just translating new vocabulary into your native grammar?