Champion Concept: Tyde, The Wave Rider

I am a swimmer when I'm not a gamer. I hope to maybe even be at the Olympic trials next year. Anyways, this is me wanting a fun water based character(I like Nami, but she doesn't cut it for me).

Lore: idk

Bio: Human, male idfk why I made a bio. His auto attacks are water. I guess that would be put here

Base stats: Ranged (600 maybe?) Kind of squishy

Passive: Hydration - Tyde gains stacks of Water for each minon, monster, or enemy he kills. He has extra mana regeneration based on how many stacks he has. This feels brutal because it's essentially stealing the water from your foes. It gives him sustain and his enemies a reason to deny his cs. I have no idea how much mana regeneration would be balanced though.

Q: Wave - ACTIVE: Tyde summons a wave that goes in front of him, pushing enemies back. No this is not an entire Nami ult, it's not nearly as large. Average mana cost and cooldown.

W: Water Fight! - PASSIVE: Tyde's auto attacks deal extra magic damage. ACTIVE: Tyde's next auto attack has extra range, deals extra damage, and slows the enemy. I have no idea how long the auto attack range would be. Low to average mana cost and low cooldown.

E: Water Jump - ACTIVE: Tyde jumps to a location, making splashes where he was and where he landed, dealing damage. Think like Ezreal blink range. Average to large mana cost and cooldown.

R: Wave Master - PASSIVE: Each level of Wave Master adds water under Tyde's feet, giving him movement speed(Scaling off of AP), and empowering Tyde's other abilities. So pre-6 Tyde is walking. 6 he starts surfing on water with his feet. The amount of water under him increases with each level of Wave Master. Q: The size of the wave increases with each level of Wave Master No, still no a Nami ult. But it's getting bigger. W: The damage and size of auto attack increases with each level of Wave Master Didn't know what to do with this one. So more damage helps right? E: The range of the jump and the size of the splashes increase with each level of Wave Master. By 16 think of Tristana's jump for the range. Yeah cool I know.

That's a lot of things on one ult you may say. But remember there is no active.

So I would really love some constructive thoughts on this champion. I really like the idea and I don't think he would be too overpowered.