hello! my first point would be that the verb åkar doesn’t exist, i think you mean åker? anyway, you use the regular form when you wan’t to say that you actually are doing something, or that something actually is happening. like
i am going – jag åker
i am – jag är
i study – jag studeraryou can never use the infinitive directly after the subject! you can use the infinitive after you use the regular form as in
i will go – jag kommer åka
i think about being – jag tänker på att vara
i will swim – jag kommer att simma
i love to sing – jag älskar att sjunga
i hate to complain – jag hatar att klagaif you use the infinite directly after the subject it becomes the same as
i to be
i to swim
i to gowhich doesn’t work grammatically! good luck