If you want to skip the manual tuning, these paid and free packs are worth exploring:

A "proper" voice-over typically follows a specific sequence of effects, which you can save as your own custom Rack Preset : Set peak amplitude to to ensure a healthy volume level without clipping. Noise Reduction/DeNoise to remove constant ambient hums or background noise. Parametric EQ High-Pass Filter

Mariana had been chasing the "warm, buttery broadcast sound" for three years. Her closet was padded with acoustic foam. Her Rode NT1 mic was positioned perfectly off-axis. But her demos still sounded like they were recorded inside a tin can submerged in a bathtub.