Which areas can a filler beginner feel safe trying?

I find cosmetic procedures difficult, and trying to look into fillers is driving me crazy. How do you all choose a clinic and get started?

I'm worried that my face might get puffy or look strange if I get fillers. I'm scared because I heard that the shape can change or become bumpy after just one injection.

I'm a beginner, so I have so many questions!

How can I tell if a clinic has a lot of experience with filler procedures? Are there any specific questions I should ask during a consultation to put my mind at ease? I absolutely hate swelling or pain, so how should I care for my skin to minimize bruising and swelling?

I'm wondering which body part a timid beginner can feel safe starting with!