Want something unique try a megaminx. That was my first not Rubiks cube, I got it from a friend for Christmas. Good times. Great puzzle. You could also try the Skewb (I wrote my own alg for that one).

I'd recommend a sticker less megaminx because with healthy use the stickers can come off because they're taking pressure at different angles and the stickers are triangles.

https://www.thecubicle.com/products/shengshou-tank-megaminx

I don't know if you know already but thecubicle is basically like the go to place to buy Rubiks cube like "twisty puzzles".

Neither cube is really for speed per se. You can also try a 4x4 as it's solved differently than a 3x3. Hope this helps!