How in-depth your form usually depends on the type of role playing you're doing. Individual roleplay forms tend to be (and in my opinion should be) more in-depth than group roleplays. It also depends on the genre. Regardless, there is basic criteria for building a character sheet as well as additional things you should just know about your character. Things like their birthday and/or zodiac sign aren't that important unless it pertains to the story.

Full Name: You shouldn't have to focus heavily on the name. Consider racial and/or ancestral background. For fantasy themes, perhaps think about their power or familial relationship

Nicknames/Alias: not that important. (Unless you're writing a creepy pasta/serial killer) Consider their personality and relationship. Should represent the character in some way

Age: keep within the appropriate/acceptable range(s) of the role play

Gender: can include pronouns. Pronouns do not always correlate to gender.

Sexuality: (Sometimes romantic and sexual orientation are separated. Know the difference.)

Nationality: Should correlate with their name, and if it doesn't, there should be a valid reason why. A girl born in Mexico with traditional parents mostly likely wouldn't be named Charlotte McWilliams.

Don't be afraid to play as a character of race different than your own. As long as you don't deliberately play into stereotypes, it's fine.

Appearance: Might be a description or faceclaim. Faceclaim should represent the race and age of your character. For the love of whatever you worship, please do not use Tom Holland to represent a 12 year old Korean kid.
If it's a description, include height, build (lanky, muscular, chubby, etc.), hair color and type, eye color and shape. Perhaps include tattoos or extra piercings

Aesthetic: Not everyone likes dark academia or cottagecore. Explore different styles and subcultures, consider trying something new.

Personality: The most important part of your character! This is who they are! Better as a written out description than a list (again, my opinion). I think it's good to base your character a bit off yourself or someone you know so that you know a lot about them, who they are and how they came to be. Their hopes and dreams, what makes them tick. There are about 7 basic component of personality, although of course, people are more complicated than that: Openness, Self-Management, Extraversion, Agreeableness, and Emotional Stability.

(Characters above the age 13 should have a very good reason for being "innocent" or "soft." Where they sheltered? Uneducated? Why is a 20 year old man innocent? Being gay is also not a personality trait.)

Strengths: Positive traits like confident, humble, friendly(can also refer to powers and skills)
Weakness: Negative traits and flaws like arrogant, selfish, insecure (can also refer to weakness in powers)

Likes:
Dislikes:
(Write likes and dislikes as they pertain to your character. This is to make them seem more interesting and unique. I see a lot of people write: -dislikes racism and homophobia- and all I can think is "well yeah, I sure hope they do." All that really tells me is that your character has human decency. Consider your own likes and dislikes.)

Hobbies: Also not that important, but they do give an idea to what kind of person your character is

Fears: Can include tangible/perceivable fears, such as fear of snakes and intangible/imperceptible fears, such as fear of failure.

Health/Disabilities: This should include both physical and mental health. Blindness, deafness, amputation or in a wheelchair. When it comes to neurodivergency and mental disorders, please be very careful if you're not a person with that kind of mental state. Doing research beforehand is good, but sometimes it's best to not portray a character with schizophrenia or DID if you don't fully understand it.

Background/story: The second most important part of your character. This makes us why they are they way they are as well as why they're here. There's no need to make it super depressing, trust me a sad, miserable life will not make you character anymore interesting. You also don't need to give every single detail of their life. Some things can be expanded upon in roleplay.

Languages: Unless your character has an advance education, travels a lot, has some magical ability that makes learning languages either, at most 3

Trivia: Just extra stuff you think people should know or might want to know about your character.