Problems with rose plant propagation

Though almost all videos show that rose plant propagation is simple, in reality some people are wasting their time and money trying to grow rose plants.
In metro cities, finding rose plants is not very easy, since the rose plant seller has stopped coming,
So to get a rose stem for the propagation experiment, roses with a long stem have to be purchased.
The rose plant seller on the main road is charging a very high price of Rs 20 per rose when the station seller is only charging Rs 10 per rose.
Despite using aloe vera and potato, the rose stems are becoming black very quickly.
There are no leaves or roots, the stem has to be discarded.

Aloe vera for rose plant propagation

While there are commercial rooting hormones available online, there are many youtube videos which claim that aloe vera can be used for plant propagation.
There are a large number of video on rose plant propagation from rose stems using various methods like potato, aloe vera plant.
In some videos, the rose plant stem cutting is placed in a piece of aloe vera leaf.
In other videos the aloe vera gel is extracted from the leaf, and the stem cutting is placed in a solution with the gel.
Almost all videos show the stem getting roots and leaves.