Worried about working closely with kids after being "fired" from JK lunch supervision when 13?

 At my church on Saturdays there runs a "respite care" for ASD children (4-12) to go too so their parents and/or non-ASD siblings can have a break from dealing with them for couple of hours.   The last time my church had a Bible Camp (summer2022)  someone at the church was talking to my Mom about why I didn't have a job (or something like that I can't remember what Mom told me)  and she suggested I volunteer at the ASD care on Saturdays.  

Back then I hadn't given it much thought but maybe in August-I think August -I might decided to actually sign up to do it  but I'm kind of troubled about volunteering closely with children because I haven't done that since I "fired"  when i was 13 almost 14 years old from lunch supervision in JK Room at my elementary school.   Most of my contact with children was during Bible Camp (from  2002-2022 excluding 2020)   were just making and pouring juice for them, and putting the snacks out for the children and cleaning up any garbage that's was on the counter from the day's activity  to toss away in the garbage.   

Main Story

The story is that when I was being bullied in Gr. 7 I got two jobs one of the jobs was what my sister did, 12 years before me be the lunch supervisor in the JK Room.  The other job isn't part of the story but I'm still going to mention it the other lunch job was me helping the custodian collect the garbage from around the school (it was a one floor school) when everyone else was outside having a sort of "lunch recess".     

Getting back to the lunch supervision that there was an adult supervisor as well in the room and her daughter and some of her daughters friends(?) sometimes came by when we're in the room.   The other thing I need you to know is that I was kind of close to this one girl and each time I was in the room for Lunch after the children ate their lunch- I would play with this one girl in particular and we seem to like playing a lot with the Vintage Little Price Little People Family Castle despite  not having any of the vintage Little People to go with the castle.   I don't remember how we played with it but we did.

Now on the day I got fired  I was playing with this one girl and we're having fun or what fun we could have because we kept getting other toys (I forgot what) been throwing at us by the "friends" of the adult supervisor's daughter and I kept throwing the toys back in their direction because we didn't want them.   I got so mad by the end  that I said something I now know I shouldn't have  something about reaping them.   But what I was unaware of until after I got up, said what I did and turned around is that the the kids who were throwing the toys now at the girl and I were some of the 4 year old girl's classmates and not the kids from earlier.   So I was told to leave and the adult supervisor shut the door in my face when I was trying to apologize and such.

 Conclusion 

So you see with my experience with being "fired" from  the JK lunch supervision is why I'm kind of unsure about being a volunteer with ASD respite centre.  I mean there would be a major different between the two things for one thing I'm older now and know not to say things like that.   And the other thing is I would have training on:  Autism education and orientation,, crisis intervention training and First Aid and CPR training (which is what I wanted to get for ages).   And another thing is I would have  on-going support (whatever that means) 

So I want to hear people's thoughts about this topic and if i have a right to be concerned about maybe volunteering closely with kids after being fired 20 years ago in the new year.