Kindly refer to the following link(s):
Making dua after prayer | By Assim Al Hakeem
Can I make dua after salah when praying on my own? Introducing new things in religion
When to raise hands while making dua and is it necessary?
Can we raise our hands and make dua after Tahajjud Prayers?
When should the hands be raised in du’aa’, and when do we make du’aa’ without raising our hands? (IslamQ&A)