Fear not! The best presentation I ever gave was when I decided to ditch the powerpoint and just talk to people :) it was scary (especially since everyone else was powerpointing like crazy) but it went down so well, I even got a little prize.
Plan your topics and make sure you know the flow of your talk (if it's a long one a few cue cards are fine), and tbh, then just improvise. If it's a non-specialist group then an informal approach is often more helpful, you can interact much more with your audience, rather than constantly looking back at a screen. If you're giving lifestyle tips, can you can ask them questions and make it more of a two-way experience? I always think that the more audience participation the better.