Aerodynamics with a character

I have been trying to create an aerodynamics system that will cause the character to glide through the air realistically. The game Bird Simulator - Roblox has the exact gliding mechanic that I want to achieve. I cannot seem to be able to get the correct forces and apply them to the character how a want, and I would like some help to be able to calculate the correct forces based on the angle of attack of the player, and apply that to the character. I have read about how to calculate the correct forces, but I do not know how I would go about calculating them in a ROBLOX setting.

Thanks for any help given!