Ok!Well if we are going to look at the potential for marriage in your upcoming SR i see some interesting things.
You have both progressions and a SR working in your favor. But you must remember that thoose are merely potentials.
If you dont get married this year there will probably be potential for marriage many times in your future.
The intrepretations i make are also based on my own culture. I dont know much about your culture but perhaps you can fill the "blanks" your self.
Your SR ascendant falls in your natal 5th and that is of course a sign of potential romance.
In your SR 1st house you have a interesting conjunction of Mars and Mercury.
In your natal chart Mercury rules the 4th house of home and the 7th house of commited partnerships.
It is conjunct with Mars, the ruler of your 2nd house of earthly possesions.
So from the perspective of your natal chart we see a merging of the natal rulers of possesions, home and partnerships.
That sounds like marriage to me, atleast where i come from
Your SR 7th falls on Capricorn and hosts both its Ruler Saturn and Pluto.
This could point towards several things.
One is a serious commited relationship with a powerfull older man, as well as a relationship with a person who might be considered Saturnian.
Another interpretation could be that this will be a year when you take relationships seriously and you might find your self in a particular relationship that will transform much of how you see the world (Pluto).
Your SR ruler Moon is in your SR 8th of (sex, death, transformation etc), ruled by Uranus, and fall in your natal 12th house of endings.
From there it trines Venus in SR 12th wich falls in your natal 4th.
The solar return year of 2019-2020 seems like a year that will alter how you look at relationships and your sense of self worth. It might be a great year and it might be not so great.
I dont know what kind of marriage-partner you are looking for.
But there are definitely signs of marriage potential when you look at it from a astrological view.
Edit: About timing.
In november - december 2019 your tertiary moon will first conjunct your natal MC and then your tertiary ascendant.
In the beginning of december transiting Jupiter will conjunct your natal moon.
What ever you do while dating men, you should do that around november-december this year
But if i were you, i would date men every day - all of the year, before commiting to one particular man