That's a good idea, I want to start doing that! :)

Usually I have a Cappuccino in the morning, then another Cappuccino around 5pm... But the second one makes me a little edgey, so this will be a nice alternative to try out.

...But I have no idea what type of tea to try?!

This is what I've done for years. A nice green tea or a Chai after dinner will make you feel good but won't give you the buzz coffee usually does that'll make you stay up too late. :-)