When i started i was a little freaked out by temps too.

You will learn soon that temp tuning doesnt mean much. It is a good idea to check every so often to get an idea of what your particular engine likes.

Go by performance. your engine should idle well, and run strong from idle to bottom to top, with no lags or bogs.

ALWAYS look for some smoke when you nail the throttle. Smoke = lubrication = not too lean. A little rich is always better than a little lean if you want your engine to last.