Please don’t soak your Crestie. Just a humid tub like so should do the trick (keep our of sun and make sure there are air holes)
I was never a great gardener. The cleanup crew (isopods) help plants grow which makes it super easy, just need to chop the plants back once a year - dependant on plant.
I think 25w is far too strong. I use Arcadia jungle uv ShadeDweller 7% ProT5. It’s 17% UV-A, 7% UV-B & 8w lamp. I have ones with higher watt as they cover several of my bigger enclosures. These are used for my Cresties but work for the plants also. I believe you should be able to get lower watt bulbs.
If you are interested in bio-active I have a made reptile care page on my website with what I did for my bio-active enclosures, including plants I use (I will add the link at the bottom). But ask any questions. I definitely recommend bio-active