I can't make my object grounded and to move it

Hello everyone
I’m a beginner in unity, but I’m trying to make my first game. I have my Player, which is a simple pixle art frog which I designed in photoshop and a water lily made in pixel art too. The objective of the game is really simple: just to make the frog jump between water lily. I’ve watched a lot of tutorials but I can’t find any that helps me. My problem is to make the frog grounded in the water lily because once I apply a ridgidbody2d in it it just falls. So my question is What do I have to do so it stays grounded and I can make it move?
thank you!

If you are a beginner telling everything in a comment will be difficult. You can watch this video >> Unity 2D Platformer Tutorial - Part 1 - Moving and Jumping - YouTube

it has everything you need as a beginner on how to move and jump a player