Greetings @Nikita-mikaelson!
I can see you’ve already got some great advice here- I second the battery-powered flicker candles 
I was a bit hesitant about them at first and no, they aren’t the same as actual fire, but they travel great and add that atmospheric element to anxiety spells and meditations that really helps me a lot, especially when I’m traveling 
They come in all different shapes, sizes, and types- I’m sure you can find some that work for you!
There were also some other great suggestions shared in this Candle Replacement discussion that may help you get more ideas.
Good luck and blessed be! 