Why is Thai so difficult? Every word means 18 different things and 50% of the words sound the same!

Thai language how best to learn?

I am an American and have traveled the world most of my life. Too many countries so never learned anything more than a few phrases of various languages.

At the age of 57, not sure if I can even do it?

Any subliminal learning techniques so I can listen while I sleep?

Do not mind purchasing a good program if that is best.

Those that have learned I would like to hear from you. Thanks in advance.

Not the right place, but help. Anyone use or have experience with any of the language training programs, Rosetta stone, etc? I want to learn Thai.