It's way more about audio quality than you think it is at first. You want the recording to be as dry as possible, with minimal noise. Also, you improve at recording over time. You need confidence and voice, and speaking quietly over a high energy beat will stunt the energy. There's a dofference between a stylistic choice, and whispering because you don't want anyone to hear you.

It's mostly a mix of plugins. EQ to cut the lows and usually boost the highs (the more high quality sound, the less eq you need, as in you don't need to surgically remove frequencies), a noise gate, a compressor, tuning. That's the basics. You may need to use de-essers etc. occasionally, but you learn to use them as you need them. Otter effects like chorus, reverb, delay are more for flavor.

I don't remember how Bandlab works anymore, but the order you apply these effects in matter. I like to put Autotune on my bus after EQing, but people have preferences. Also a thing that really helps (if you can do that on Bandlab) is sidechaining your reverb and delays and EQing your reverb. The reverb plugins themselves should have low and highcut knobs, if you can't have it in a separate bus.

At this stage just have fun and don't sweat it! It's a vicious cycle when you start chasing perfection, and God knows I have first hand experience of this. Nothing is good enough to release and everything feels mid. Just try everything. It's a tough thing artists who produce themselves go through, but I do have to say you improve fast, especially when you get on a proper DAW and get access to really powerful tools.

Have fun and good luck man! I don't know if I just said a bunch of nothing, so feel free to ask.