My hair is ear length with layers. Age has thinned it and made scalp more sensitive
I discovered Olsson hair products designed for sensitive scalps - When required I use shampoo, conditioner, hair mask, styler, and the excellent hairspray, none of them irritate my scalp, need to only use a small quantity and they last a long time. Online and some available via Amazon.
Sensitive Cleansing Products – Olsson Scandinavia (UK)
I am useless with dryer and round hairbrush a la hairdressers. I use a round hot air dryer with a small barrel for short hair.
Revlon Hair Tools One-Step Style Booster - Round Brush Dryer & Styler, Round Brush- 38 mm (Thermal Bristles, Ceramic-Coated Barrel, Ionic + Ceramic Technology) RVDR5292UKE, Black : Amazon.co.uk: Beauty
it has two brushes 19mm and 25mm - I use the smaller 19mm all the time. Wash hair pat dry with towel, use styler spray and style with hot air brush only, lift hair wrap around brush hold for bit of curl or brush slowly to dry and smooth
hope that information is of use