Welcome to the pipe side! As far as tongue bite, there is a mouth rinse some guys recommend but time is your friend. It will usually get better within a few days.
The main cause of tongue bite is smoking too fast or hot. Just slow down a little while smoking and take your time. It's okay if it goes out as you can just relight. Some people's body chemistry makes them more prone to tongue bite and you may be one of those individuals. Certain blends will cause tongue bite more often than others. It is my experience that cheaper aromatics will burn my tongue more often than virginias etc.