The best way would probably be to go to an english country. Or to find friends with whom you can practice.

I'm not an expert but as I see it, there are three weird sentences : The third one "I tell them of their goodness." doesn't make sense : you can't "tell someone of" you "tell someone something". But if you say "I tell them their goodness", which is grammatically correct, it still don't really make sense. What do you mean by "goodness" ? What do you want to tell them ? The fifth one "There are certain things that a lady won't be able to tell." The meaning of "tell" is ambiguous, as it can hold two different meanings. Maybe "won't be able to say out loud" is easier to understand. Well of course I'm being stingy here… Finally the last one, "sweat" means the liquids you generate while running or doing exercise. For something lie candy or chocolate, it is written "sweet". Well, that's it for me, I hope that helps.You should still check with native speakers though :)