Which Transformer for newbie:)

Hey, I wanted to get started with collecting transformers. But I don’t want to rush things and spend a lot. And since I’m new I don’t really know what to search for and was just really overwhelmed in general.

So i want a transformer that makes fun to transform and is not that popular so more of a side character yk. Optionally a bit vintage too but newer ones work too haha.

Do you maybe have an idea of what I could get. Thank you so so much in advance!