I would be happy to! As long as you can converse alright, then I can help. Check out my profile and see what you think :)

Personally, I use the British spelling for "Theatre" and "Saviour" for no other reason than I prefer how they look over the American spelling.

It is okay to say both "I'll go to work" or "I'll stay at home," however they would not typically be used alone. For instance, you could say "I'll go to work and then I'm having dinner with a friend." For the most part, the present continuous tense is always used.