Learn to use raw for your serious photographs and keep jpg files for parties or other occasions when you want a lot of pictures with no fuss.

Why use auto white balance (awb) all the time when the preset settings are often better. Try it an see for yourself. So often auto white balance is influenced by the colours in the picture rather than the prevailing light conditions. In jpg mode it is difficult to correct an incorrect awb, much easier in raw..

Do not be afraid of using high iso's. The old values are gone now and with care and noise reduction no one will know. Try some shots and be surprised.