okay here is the answer pal. Focus on getting your highschool diploma done okay and whether it is in samhall or natur just make sure you graduate with MVG/VG okay. TFHS is a good school but like many flight schools in sweden they set their standards high to weed out a bunch of people who should not belong in an airplane. Trust me to become a great pilot you don't need to go natur. I know many Captains flying for major airlines who have 4yr history degrees and neither one of them ever studied any major math, physics courses in highschool or college. I graduated highschool with SH then went to university for 4yrs studying Finance, worked in Finance for 3-4yrs then got my private and now working towards instrument and the all 9-yard. Look don't worry so much about natur vs SH just graduate with good grades. If you later decide you wantt go to TFHS then all you need is to take a few courses in fysik, Math, and whatever else they want you to take.
OC