My first flight lands at 6:14 p.m and second flight leaves at 7:00 p.m di I have enough time to make the second flight

You should he ok.

It also depends on whether it's in a different terminal. Typically, boarding starts 30 minutes or more before flight departure so terminal changes are risky

Yes... just inform ur flight attendant... So she can get u the information for the gate of the other plane and how to get to it