What an amazing story!
A couple of times I had a similar situation, where I paid for my brothers education, because my parents couldn't, but I used the money I earned from freelancing, as I couldn't get a job. He finished, and I am still freelancing. I am glad I could help him even tho I needed, and still need money. But hey, you gotta sacrifice for family <3
At that time I wasn't into crypto, but now I discovered Steemit, and the only reason I am doing it, is because it's content based and rewards creators, which is important for me as I am an digital artist.
Although I don't hope to cash money any time soon, I like the philosophy of the Steem platform, and I want to participate in hope this will grow into a popular platform, and attract more creators from mainstream platforms, to join Steem.
Congratulation to you for graduating, and to your brothers in advance as well! :D