Venus will be trining Uranus for me in a few days, is this a good chance that a chance/first love encounter can happen? What about mars trine sun? I have my transit chart below.
Astrology is
a bit like weather forecasting.
If you want to meet someone, you have to go outside and meet them. The weather forecast can help you know if it's going to rain or if it's going to be sunny which makes it easier or more difficult to be outside. But in either case, you still have to put one foot in front of the other to meet people, the weather can't do that for you.
This is especially true for you since with your natal Saturn/Mars/Venus T-Square is asking you to be realistic and put in some effort in this area. Saturn rewards those who put in effort and the results are very tangible and long lasting.
So to help satisfy Saturn's requirements, why not make a plan for how you intend on manifesting this relationship. Saturn respects things like long-term vision, non-attachment, service to others, dates, deadlines and things like that.
It would be a good start to visualise being in a relationship. How does it realistically feel, how is your average day different, what makes you happy in the relationship, what's it like having less time to yourself, what's it like meeting her friends, do you feel any resistance to any aspect of it etc. etc. The more you harmonize with the realism of the picture and the likely consequences, the more you resonate with your new reality and the smoother it manifests.
At the same time, you will have to take action. So why not plan some concrete days where you will definitely go out and approach people with the intention of having fun and giving them positive vibes (non-attachment).