Hi Cambrian welcome to the thread.....
I am a year on in my dating journey and quite a few of the things you said have resonated with me.
My first dating experience out of my LTR was with a guy who messed me around something chronic and it got me off to such a bumpy start.
It's very difficult at the start to not get overinvested and it does get easier in time.
The best advice I can give you is to work on yourself - concentrate on making yourself mentally strong, have high self worth and the guys who put low investment in or who flake on you won't be given a second thought or get under your skin because you know you are worth more.
People are flaky - perhaps intentionally and unintentionaly. It's just how it is. But it does not mean you should tolerate it at all.
I would 100 call someone before a date.... It's a rule of mine now, once I didn't and it could have saved me from the world's most boring date.
There are some great things online about navigating the crazy world of dating which I have used time and time again - still using now.... Check them out:
YouTube Channels:
Mindful Attraction 2.0
Matthew Hussey
Amy young
They all offer something a little bit different but I use them all at different points. Amy young is particularly good for helping you focus on yourself and building up your self worth and setting standards for yourself and what you are willing to tolerate.
Everyone here is such a supportive bunch and the thread has kept me sane on more than one occasion .
Good luck + remember - you are the prize x