Top shampoo, conditioner,hair oil and hair mask to try?

Im new to Berlin and would like some recommendations on top shampoo, conditioner,hair oil and hair mask to try here.

I've wavy hair and currently facing hair fall and I'll check with a dermatologist later. For now I need some help to understand what products I can buy.

After some research I shortlisted hair oil - im going for Mielle, Scalp & Hair Strengthening Oil, Rosemary Mint but other products need your suggestions