Is it lighter in the morning when daylight saving begins in march or when will it begin to get lighter earlier in the am?

When daylight saving time begins, the clock change makes it seem like an hour of morning sun is moved to the evening. So DST effectively "delays" sunrise by an hour as shown on your clock. For those in the northern part of the US, it will be mid-April before the sun rises at an earlier time than just before DST in March.

So, for example, if the sun is rising at 6:30 AM and setting at 6:30 PM just before the change, the sunrise time becomes 7:30 AM and the sunset time becomes 7:30 PM.