Well, here's the thing OP.
There are books dealing with the non-Chad trying to get a beautiful female's attention. There's hundreds.
It's a basic concept called "going after girls out of your league" and its been done in movies, books, comics, SHIT, every VN is based off this concept.
The thing is, the number one reason why people like YOU lose to CHADS every time, is because you don't fucking try.
You're non-competitive. They have something you don't and that's confidence. Faked or real, they are proactive characters, and everyone loves proactive characters.
You see any famous stories about people wanting to not get involved with conflict, and ignoring it completely to maintain their safe little life and do nothing? No. Bilbo left the fucking Shire. Hiccup went out and got himself a dragon. Kamina went out to fight the Beastmen, and Neo decided to give up his normie life for what he truly wanted.
While life can't be simplified and streamlined like a piece of fiction, the same rules apply. You cannot earn those beautiful girls by NOT LEAVING THE COMFORT OF YOUR REGULAR LIFE.
Because then those Chads you despise so much will, and then you'll be giving them no competition.
You don't get girls by sitting on Veeky Forums. You don't get girls by binging video games. You don't get girls sitting on a computer not doing anything. That shit doesn't earn mates.
It don't impress the gullible hormonal stacey that wants to show her dick trophies off to her friends, and it won't win that Hanako look alike you've been pining over on Instagram. You can't win them if you have nothing to show for it.
This is why you go out and do stuff. Go hiking and take pictures. Do different recreational activities, get involved with a hobby you can show off. This is why guys who exercise, who work on cars, who play guitar, who skateboard, get so many women.
Because you can display them to females and get their attention, approval, and eventually continuous praise. You DON'T get it by snapping pictures of you sitting at an intense playthrough of EVE or ARK, and you sure as hell ain't going to send her into a warm-faced yearning lust over your gamerscore or hours on steam.
The second strategy you need is numbers. Humans are social creatures. Who you hang with gives you a group advantage.
Usually you see Chads in groups of Chad-like people, and the reason for this is because they get a TEAM ADVANTAGE when trying to impress members of the opposite sex. A girl is more comfortable rejecting you with her friends around, or when you're in a group filled with people that are the same "Attractiveness level" as you.
Numbers matter. When you show up with your friends, all of them laughing and happy and providing an aura of comfort, it also makes them less apprehensive. It makes them comfortable as well. Whe you come around by yourself, shyly sniveling and pretending you AREN'T trying to start up a relationship with her, her instincts are going to make her drive you off.