I’m sorry for your loss. Do you have a US visa? Did you obtain a SIN#? Do you have any medical conditions? In some provinces you won’t be able to get a health card without a valid PR card. Your health card is probably expired but even if it isn’t you would have to reapply since you haven’t met the residency requirement to qualify for public healthcare in any of the provinces. If you do come to Canada via the US border without being reported you should take out private health insurance to cover your emergencies. Your brother was in critical condition in 2018 but how long did he remain hospitalized, need care for daily activities, etc.? How old is your brother? Is your father involved in your life or if not who else became your guardians? Has your brother remained unable to work, study, care for himself, etc.? If he remains disabled what has changed recently that would allow you to come to Canada and be able to commit to remaining in Canada for around 2.5 years without being able to leave? The past 2 years since you turned 18 are fairly important for IRCC. What was preventing you from coming to Canada in the past 2 years since you turned 18?