What are the signs of mild autism in a child?

I copied people from TV shows or films, their way of walk, talk and personality.

I used to hit my siblings very often, that was my way of playing with them.

I had limited interest in another children, I normally played just with my brother but no other children. I occasionally played with my cousins.

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I loved to run from one side to another side and jump a lot, I always did it everyday.

I had trouble sharing objects and food, normally someone had to tell me to give them something. I sometimes didn't want people to have my objects to the point of meltdowns.

I interacted with older or younger children and if I didn't have that chance I talked to some teachers.

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I had trouble answering questions about topics that didn't interest me or I just didn't answer.

I watched some films over and over again specially my favourite scenes.

I didn't know why people felt happy or sad in determined situations.

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I learned many skills like reading and writing earlier than other children.

It was very difficult for me to get social cues so I had inappropriate responses many times.

Anything could make me laugh to the point of annoying other people.

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I also didn't group play, I was physically close to those children but I was parallel playing most of the time.

SIGNS I HAD AS A BABY (0–2 YEARS)

I didn't have a social smile and I sometimes had exagerated facial expresions or just expressionless.

If the world was flat, would it be possible to see Mount Everest if it was on the other side of the Earth on a clear sunny day?

I had problems to follow instructions and to follow rules, I always got in trouble for this one.

These are my resumed signs of autism when I was a child. Most of them got overlooked because the only thing about autism my parents and grandparents knew was about very severe cases of autism. Another factor is that I was born female (I'm trans) and that I masked from a young age.

I will answer this question showing my signs of autism I had as a child:

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I wasn't unable to get non verbal communication and non literal communication too.

My reaction with other children apart from my close family approached me was mostly walking away or hitting them.

I loved to stay alone in my room drawing or playing with my legos, I could do that for hours.

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I used to bite my fingers and hands to self regulate. I sucked my thumb sometimes too.

I had trouble to be fed. I ate slower and it was difficult for me to stop drinking from the bottle or breast. I also had trouble eating solid food.

I was a calm baby, I didn't cry that much and I didn't need another person's entertainment.

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I had a fantasy world, I was always there and that was the best place to be, when I was anxious I went there and zone out.

I was under sensitive to bowel and bladder feelings but other Interoceptive feelings felt just too much.

I made too much eye contact, I just stared at people's eyes for very prolonged times often causing discomfort.

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I always had a justice sense, if there was no equality or justice I would get very upset about that.

I woke up and threw all my toys away from my crib and start crying.

I didn't pretend play like the other children. I didn't know how to do that specially with other children.

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I was over or under sensitive to most sensory input causing sensory seeking oravoiding reactions.

SIGNS I HAD AS A CHILD (3–12 YEARS)

I was very obsessed with angry birds, I played angry birds, I had ab toys, I watched ab in TV and I was so obsessed with that.