saturn placed in sagitarius lagna and in 7th house aries navamsa

[Tittu]

Hi i am a learner in astrology i want to know is it true that if saturn is placed in lagna it gives alot of struggles to the native in terms of education, family relations and marriage. Also marriage would consist of one getting married to some one who is much older than the native.
Navamsa is the chart that we see after native is married, so if saturn is placed in 7th house of navamsa chart in aries house does it again mean that married life will be full of struggles.