Nowadays, home brewing to make a beer is already possible as there are premixed beer mixes that are sold in the market. With this, you could experiment on premixed beer flavors and combination that the end product of it can be branded as your beer.
Beer is made with sugar and yeast, mix and cover, ferment for 4 weeks, then bottle your beer.
Use Burdock and dandelion, berries, anything to flavor the mix before fermenting.
Yes, you can. It requires a lot of planning and plenty of space to make your own beer though. You can get your own hops and figure out what kind of beer you want to make. It's important to talk to a reputable and knowledge brewmaster to make sure that you are making it right.