You might like to watch a few of Sasha Hoyer videos...
🙂 He's a quite innovative aquascaper... Unfortunately, it's in German but I guess most of it doesn't really need narration to understand what he's doing and give you inspirations.
He has an older video where he's scaping with the use of foam (The yellow one)... But it's quite a while ago and he posts lot's of video's I can't seem to find it back that quick. But I know it's in his youtube channel. I suggest just watch them all... This guy is good at what he does and very versatile too...