How to shave down there!!

Hey guys,
So I've tried a couple of times shaving down there and it always gets sore and kinda pimply and red spots down there . Am I doing anything wrong or is there anyway to make it better cause I really need to know. I'm 17 and a gymnast so it's important to not have hair down there otherwise that would be really embarrassing haha .
and I don't want to wax just shave , any help would be so good 
Thanks :)

Glow Resources

Let’s Glow

Glow is here for you on your path to pregnancy

Glow helps you navigate your fertility journey with smart tools, personalized insights, and guidance from medical experts who understand what matters most.

25+ million

Users

4.8 stars

200k+ app ratings

20+

Medical advisors