The TEAS is very differnt from the NLN.
Did you buy the book from ATI? It is a very good preparation for the exam. It is $25. If you don't have it, I have a used copy I would be happy to sell cheaper.
I think that if you did good on the NLN you can certainly do good on the TEAS (I had 99th percentile on both), The only major difference is a Reading Comprehension section that is quite easy and the English section will actually ask you to choose between multiple choices the correct spelling
for some words in a text.
Be sure to review the concepts outlined in the science section.
If you have additional questions don't hesitate to write back.