Like any relationship, communication is key when bringing voice talent on to your project. This video is your baby, something you’ve been working on for awhile, so you will get the best results if you can communicate your vision for the project. Provide background on your brand, on your customers, because your voice actor can use these details like fuel to accurately represent your brand.
As the engineer, your key job is to select and set up the recording space, choose and position the microphone, set levels and make sure you're recording a good, clean signal at a healthy level. Like music, the louder the signal you want to record, the less audible the noise floor, but you don't want to have to speak louder than sounds natural, and you don't want to overcook things when tracking: any distortion will be very noticeable on an exposed voice part, and an otherwise great take with digital clipping won't be acceptable. If you notice clipping only when you start editing, software clip restoration tools might help to make the take usable, but it's not going to be perfect. Remember that although you may have needed to record 'hot' on analogue tape and older 16‑bit digital recording systems, modern 24‑bit A‑D converters can accommodate a much wider dynamic range, so you no longer have to track so loud: you can leave much more headroom.
Initially you will of course be a novice and even if you have a great voice, you will need to get yourself grounded in the industry. Again, this process will be down to how many hours you put in. Each person’s voice is individual and unique. For some people that means that they have a natural signature voice which is suited to certain types of voice over work. Other voice over actors have a natural passion for a particular aspect of the industry, such as character acting and so pursue their goals in that genre.