I am growing my hair pls give haircare tips, girls and guys with long hairs

Well im growing my hairs and they are of lwk decent length now but from past month after shampoo idk what to apply on them. Like i have tried using oil not that good results, then serum the problem is that they get crunchy type and like trash after 6 to 7 hours later. What do you guys apply on your hairs after shampoo for like styling or just hydrating them.