Exercise of the day

Next week will be difficult. My mother goes to the hospital and I need to take care of our home. I have to prepare dinner, I have to cook, sweep the house... I will ask my father and my brother to help me, because I need to study to complete my degree. I should go to the gym every day and I would practice Slackline every night but I don't know how. In the end I'm here because I'm studying English by ' MyELT ". The exercise of the day is about "should", "should not", "have to" and "don't have to", so I understand that these expressions are used when I have a obligation or actions that I'm expected to do but it's not necessary, for example "I have to brush my teeth every day after I wake up and before I sleep " or "I should brush my teeth after eating, but I forgot to today!" All right?

Thank u.

Ps: I wrote fast, sorry for the mistakes. :P

"Have to" is always an obligation, however "should" is used for advice, recommendations, or should that's a good idea...

I have to work tomorrow.

I should do some exercise before I go to work. (A good idea, but not an obligation.)