am i losing hair

Hi nearly 25 years old and I was wondering if I am balding/where on the Norwood scale am I? Additional info: Very thick hair, especially on top and around crown, however just concerned (maybe paranoid haha) about the temples and front....my front and temple hairline on the other hand has seemed...

I’ve never used hair loss product but I think I might start. I attached a picture of my hair now and what it was before, I’m not sure why it changed but should I start using something? What might be good?