Hi 
Oh, I understand the pressure you mention about being the eldest child because I am also the eldest sister. It is inevitable that you feel more responsible, but the important thing is that you are aware of your freedom to help or not depending on what is good for you. Do not forget to put yourself first because you are the protagonist of your life. To be honest, I am confused by your large family; it seems like a soap opera, hehe. I hope you all get along well and share happy moments together. I wish you luck with your degree and hope you become a teacher soon.
Tips and information as a Hive newbie here: newbie guide.
Communities you might like that are part of the OCD Communities Incubation Program. Important: read their rules and post in the one that fits your content.
Have a good day!
RE: Envading Your Territory: A Benevolent Lady