Can I apply moisturiser right after vitamin c serum? Or shall I wait for few mins? Also do I wait before I can get into sunlight?

It is generally recommended to wait a few minutes before applying moisturizer after vitamin C serum to allow the serum to fully absorb into the skin. As for sunlight exposure, it is best to wait at least 10-15 minutes before going outside to give the serum time to settle and protect the skin from sun sensitivity.