The impact of a tutor to a student in music (an outing performance for classical)

Music generally is very wide as we all know and one can know everything at once because one will continue to learn each and every day, there is this saying that only when someone die that is when he cease to learn because they surely things you will see as New each day as you continue to live and which you will want to know more about. I have been playing the keyboard for a while now and I know that my playing then compared to now has improved a lot and this can only happen through a proper rehearsal and a constant one so for this year it's been a while I did an intense rehearsal compared to the one I have been doing for a long period.
https://www.instagram.com/p/CvP0kL7tPSX/?igshid=MmU2YjMzNjRlOQ==
(link to the full video.. i was the one on keyboard)
I happened to be the main keyboardist in my student fellowship church which is a celestial church and we are known for doing a lot of classical music compared to other denomination so I have this certain boss introduced me to classical music because I'm not a fan of classical music before so after I graduated from the school I was left with no teacher physically but we do talk online and anything I don't understand he would explain to me. So last week we were invited to a cathedral as one of the choir that will be presenting a classical song for their program so who started the preparation for a classical music to do.

there was not much intense rehearsal due to examination which we were doing currently in school then we go to the place and we did the performance even though many were amazed and clapping due to her performance but immediately we left the stage my boss who used to do some tutorial for me online called me aside and told me I did a lot of mistake while playing which was not clear to all the people listening to it but he was able to figure out and that is what we call music to some people sounds great and to some who know the music so well it might not sound right.

So some of the pictures which we took will be dropped and you can check the link also for the full video cuz I'll drop some here so you can check it out.