blender may be hard to use, but there are very good tutorials on youtube that can tell you the most basic functions. i started off with this tutorial about literally a decade ago, and it really helped me learn the bits of blender i had issues with. good luck!
It's whichever 3D modeling program you want to use. Blender is the most obvious recommendation due to being free. opensource & powerful. Other good choices are Maya & 3Ds Max but both of them are paid