Can you get to your desired league with the cars and tracks you get when u first sign up?
Car wise there's a progression:
MX-5 in Rookie
Spec Racer Ford in D-Class
MX-5 (again) in C-Class
Track wise, without spending anything, you might be limited in the D- and C-Class series to what weeks you can run (but there are almost always some weeks using basic tracks).
However if you spent the money on the tracks that are regulars in the GT3 series that would open it up without 'wasting' money.
Or the TLDR version, Yes.


