It’s not just toe though. Some horses need their heels rasped to keep them from getting too tall, or running under. Others flare at the sides and wear their toes. I almost never tough my warmblood’s toes other than a light rasp from the top to prevent chipping.
OP, the nice thing about DIY, is that you will spend much more time handling and looking at your horse’s feet than any farrier. And you can pick up your tools and make small adjustments any time you see something “off.” However, that can also dull your eye to imbalances that you see every day. Taking good photos at ground level of all aspects can help a lot, especially when you’re just starting. Often a mouse-eye view of the hoof in a photo can be more revealing than looking at it in person to determine what is needed. If you have an iPhone, HoofMapp is an app that can help. Good info here: https://www.youtube.com/watch?v=-Y6tqd4OtWM&t=3305s