During the soundcheck process, place your mic in a stand and adjust the height and placement that works for you. You want it to feel comfortable so you don’t move around too much (or your voice track will sound like it’s fading in and out). You should also be mindful of your input levels. Check to make sure you’re not clipping when you’re singing at your loudest.
If you’re a Splice user, you can choose an 808 sample from their library, or just generate your own and drag it into a sampler (not a drum rack!) of your choosing. Most samplers will automatically start resampling the sound so that its pitch is adjusted as you play it in.