@msolga,
Why not opt for serenity at any point?
Many friends have finally met someone compatible once they "gave up" and settled into serenity -- others have settled into happy single serenity.
So long as you're not a recluse and have reasonable chances to socialize, I think serenity is the way to go pretty much no matter what your preferences are.
I definitely think "trying" is dangerous and draining. I've known far too many people who were desperate to get married, searched high and low (very low), found someone who finally seemed like a plausible marriage partner, jumped into marriage, and then lo and behold, problems arose once that point was passed.
Serenity is a much healthier starting point IMO. Where you're happy to be single, and it has to be a pretty amazing person to convince you to give that up.