You are with 2 problems of face i) dry skin
For dryness of face you could use a moisturizer cream or lotion and wash with oilatum Bar few times daily.
for Black line on nose (melasma) you are right way of treatment. you can add a sunscreen cream (Spectraban 21) with it.
If these above measure failed you can try IPL (intense pulsed light) or laser therapy
by a dermatologist
Dr. MM Mahmud (firstname.lastname@example.org)