There is an official discord server for the game. The link to it is on the main page.
About Patreon, everything is quite simple: the developer writes under each tier what exactly you will receive as a thank you for donating a given amount. If you just want to support the developer, without pursuing the goal of receiving something in return, then you do not need to worry about the amount - you can specify any amount there that you can donate. The funds are not written off immediately, but at the beginning of the next month, if I remember correctly (I haven't used Patreon for a long time and may be wrong).
And yes, I know about Alt+F