Going on 10 years with my beard. The ladies love it.
I don't shampoo since it's strips the oil out of the beard hair. I use beard oil when I'm fresh out of the shower. I use to buy, but now I make it, there are several recipes online you can find to get started, and some playing with what you like as a base since skin type matters. I use jojoba oil, and essential oils (I have several scents depending on mood). I comb with a boars head brush that does a better job than synthetics at moving oil around. During the day if I need sprucing up, I use a beard cream that's more wax based, this I buy from the dollar beard club. Trimming is important, not just for looks, but for promoting growth. Most people just let it grow to try and get length, but just like regular hair, you can get split ends, trimming takes care of those and promotes longer growth. If I don't care for my beard, it gets wild and crazy.
I agree @reverendsasquatch, don't get a freaking stupid haircut with it...lol. My barber is out of the shop for a while, and had to go find a quick replacement, had to tell her about my beard "a proper beard for a proper Alaskan", not that hipster BS.