Did you get any of your current fish at the Betta Shop? Hoping to go there this week, they get a new shipment in tomorrow. I'm afraid I'm going to end up buying a couple females for my sorority too and spend more money than I should, hah. I've heard so many good things about that place.
What's you pH? It may be a little on the high side for a CTs fins. Driftwood and/or IAL or Oak leaves might naturally lower it enough to straighten his fins. Of course then you have tea-colored tannins in the water. Some people like that. I don't much.
Pineapple is yellow scales with black scale-tips. If I see a pic, I'll show you. If his body color were blue, he'd be a MG (mustard gas...what an unfortunate description. Thai breeders don't have the background to know that). Color-wise, he's a copper---several layers of color that change when the angle of the light changes. But he's so clearly green..most unusual fish.
I'm the Anubias King. Almost all my plants are some form of Anubias (big, little, medium, long-leaf). Tough, low-light, hard-to-kill. But they grow very slowly and don't do much for water quality. They make great shade, hides, hammocks when you float them. Floating plants are good.
Plants, for me, are more trouble than keeping fish. Special lights, timers, substrate, fertilizer, etc.That's for fast-growing plants that eat ammonia. Check the planted tank section of this forum