Does the duration of use of anti-aging cream make a difference in effectiveness?

Lately, my skin feels dry and lacks elasticity, so I am wondering if I need a firming cream.
I am wondering if using a firming cream might help my facial contours become more defined, even just a little.
I would like to know if firming cream works immediately upon application or if it requires consistent use to see results.
After comparing various products, I see significant differences in the ingredients of firming creams, so I am having trouble deciding which one to choose.
I would like to check if there is a firming cream that is safe for sensitive skin.
I am also wondering if there is a synergistic effect when using the firming cream together with other moisturizing products.
I'm a bit confused about the criteria for choosing a firming cream; I'm not sure if a high price automatically means it's good.
I am also wondering if skin elasticity can be restored with firming cream alone.
I am also wondering whether it is better to apply it to my entire face or only to specific areas.
I would also like to know if consistency is ultimately the key, and if there are any precautions I should take when using firming cream.