Don't try to do too much, too soon. Grow a full beard, or as close as you can get, and see what you've got to work with. Then you can decide to trim or sculpt it into some fancy shape if you want.
Learn how to keep your neckline trim and then take it from there.
Buy quality trimmers first. Then, hypoallergenic conditioning cream/salve for after washing it. Once you've got a routine down, try watching different vids on shaping/trimming, but a healthy beard comes first. Nothing handsome is gonna come from going in blind, so learn to take proper care of it first. 🤙🏼