Saturn going direct on 11thOctober 2021 and which houses its going to affect as per ascendants lets see ...

Saturn rules two signs : Capricorn and Aquarius.

As per the Kaal purush kundali where the ascendant is Aries , saturn rules houses 10 and 11.

Ascendants and houses ruled by saturn are mentioned below :

Ascendant : Aries.
Houses ruled by Saturn : H-10 , H-11.

Ascendant : Taurus.
Houses ruled by Saturn : H-9 , H-10.

Ascendant : Gemini.
Houses ruled by Saturn : H-8 , H-9.

Ascendant : Cancer.
Houses ruled by Saturn : H-7 , H-8.

Ascendant : Leo.
Houses ruled by Saturn : H-6 , H-7.

Ascendant : Virgo.
Houses ruled by Saturn : H-5 , H-6.

Ascendant : Libra.
Houses ruled by Saturn : H-4 , H-5.

Ascendant : Scorpio.
Houses ruled by Saturn : H-3 , H-4.

Ascendant : Sagittarius.
Houses ruled by Saturn : H-2 , H-3.

Ascendant : Capricorn.
Houses ruled by Saturn : H-1 , H-2.

Ascendant : Aquarius.
Houses ruled by Saturn : H-1 , H-12.

Ascendant : Pisces.
Houses ruled by Saturn : H-11 , H-12.

Check the houses saturn rules as per your ascendant and where the planet saturn is placed in your birth chart and read about those houses ,planet saturn and try to relate those houses and planet saturn with each other and that's how you check how transits is playing out in your birth chart.

Points to remember :

If you are not going through the saturn mahadasha , antardasha , prayantardasha then this transit will come and go and nothing will happen.

Ashatakvraga points of the houses which saturn rules and where saturn is placed will say how much affect transit will bring for the native.