Why are you interested in learning Thai language?
I am not sure about your answer, but I am certain that Thai grammar is not difficult.
If you know words, you can line them up, make a sentence and speak it right away.
I have collected practical grammars and vocabularies necessary for daily communication, and then turned tem into this book for people who want to learn Thai language just like you.
I hope this book can help you succeed on your journey of learning Thai. Take your time and enjoy yourself one step at a time.