if your save is from 0.6.5 you don’t need to start over. On pc saves will carry over so you will be ok. Android you need to back up your saves first and then transfer them over
Am I going to miss out on anything from the update? More concerned about whether I should restart or not
If you have completed everything from the 0.6.5 update you will be ok since all the new content is a continuation of the current story.