I think one of the best cars to set you up skill wise, and is still fun to drive is the C-spec RUF (Porsche). Might be one of the first purchases you want to make. It also includes two other version of the RUF, one that is not used, and one that is the GT3 version.
The C-Spec is a great springboard to other cars, as it takes some skill to master the throttle and handling, which will help you transition into cars like the V8SC, Corvette, Mustang, etc. It's slower than the GT3 version and the other cars I just listed, but it basically uses "street tires" and less racey stuff that makes it tricky to master. The C-Spec is used in the RUF-Cup, which is a C license series (you'll need a D 4.0+ in order to do anything other than practice)
Plus as I said, you get the GT3 version for free. Not my favorite car on the service, but I can't deny how fun the C-spec is, nor how utilitarian it is.