@CANDC, @Travelinglady
Thanks for your ideas. However, I must say many of these might not help me.

Firt of all, in my case eating healthy is eating what I can because of my lifelong health condition. Also when it comes to staff in supermarkets, in the countries where I live, there are no baggers and check outs are more frequently done self-service.

About the physical excercise, you are right with "if you do not have any injuries." Unfortunately, I've had certain injuries recently which prevent me from doing anything what involves my dominant hand (involving all the sports which I enjoy), so my plans for sports or gym were washed away for at least half a year. Then, I expect to be very busy with my studies. By doing anything, I mean even holding onto something with that hand. Sometimes, I struggle to open the door, so I really cannot do sports now.

And when it comes to my interest, my main one (which is much more than interest for me, it is part of myself) cannot be spent time with because of the mentioned injury. And I don't know if it ever heal enough so I can return to that. Apart from that, I plan to visit one place regularly because of my interest, but most of people there are not in my age group. And those who are, are there for different reasons and act accordingly