I would advise going to a professional to get them shaped for the first time since it can be very easy to mess up when doing it yourself. But if you choose to DIY, I would say to watch a video on youtube so you can see exactly what that person is doing.
I like to get my eyebrows threaded 1-2 times a month and I tweeze them every week to clean up any stray hairs. I also sometimes wax them if i'm in a hurry since threading takes a little longer. I have semi-thick brows so I like to use a clear brow gel (ELF Duo Clear Mascara & Brow Gel $1) on my brows so they can stay neat throughout the day.
When I go out I like to use the Wet & Wild Brow Kit (about $3.99 in drugstores) to fill in my brows so my overall look can be more polished. This kit is awesome, it comes with two shades of brown eyebrow powder, a slanted brush and a wax. It's especially good When filling in your brows, use 2-3 shades darker if you have blonde to light brown hair and 2-3 shades lighter for medium to dark brown hair. Same thing goes for when you dye your hair. NEVER match your eyebrows to your hair color, it won't look natural.
Wet & Wild Eyebrow KitTools to Have
tweezers- I love love love the tweezers by Tweezerman. they are very good quality and they come with a lifetime guarantee. They cost between 12-15 dollars.
brow gel- I like to keep some in my makeup bag for touch-ups throughout the day. You can also use clear mascara.
brow scissors- to cut any long or out of place hairs.
brow pencil or powder- I prefer the powder. Eventhough it takes longer, I feel that the pencil goes on too heavy on me.
Thanks For Reading!