Nice responses. Much appreciated!
From previous posts I observe some misunderstanding of the social situation with my fellow gardeners.
To be clear, my fellow gardeners are mostly pensioners and they do not listen but only talk. There is no discussion and there is no curiosity from them. You have to understand the social position I'm in. I am treated like an unwanted child and looked down upon by most; because of my different appearance, old rusty bike and having no tools and no money. I've tried several times to start a nice talk by asking about this or that, but the moment I come up with arguments to further my understanding they immediately countermine and raise their voice and stop listening. I feel that I can't even say something interesting because I am so low in their judgment (I am not shy or bullish). In general they do not show respect apart from some exceptions (mostly females).
I think what's important for you to understand the situation, that this is an area with many (very) rich people and many old people. This is an area where still some old women walk at a respectable distance behind their old husband. Judgment is made without any consultation. Many people who live on the road where I sit in the woods still think after a year that I am some sort of tramp.
Really, if I would have shown up in a Jaguar in this area, wearing nice clothes etc., things would have been be very very different because their immediate judgment would not have been "here's a bum, a homeless bum, this person cannot be trusted". I have learned a lot. Here are many good people (compared to Amsterdam) but they won't open their arms or houses or friendship. They keep at a distance. I can only conclude that after a year, still nobody trusts me. It is what it is.
At the gardens I have shown my good will at two occasions with communal maintenance where I really did (more than) my part. This doesn't matter at all.
I can understand that it must be difficult for you to know what's it like to have such a low social position and no affluence. How you're treated and judged.
How all the nice things I do, the pleasant conversations, the high morality of my actions, the cleaning of nature and street from litter, my integrating by learning Frisian language fast, my athletic prowess and health (i.e. not an alcoholic or junk), my good will, my giving away home made buttercake, my forgiveness after they have been not-so-nice by not mentioning it again, trying to adapt and trying to introduce myself as mathematics teacher, are apparently not enough.
I can understand that many african immigrants (without family/friends) have it even more difficult in getting accepted and trusted.
A social life is the only important thing missing in my life (humans are social animals). I sincerely miss the friendships I had in Amsterdam with very intelligent young people. If only for intelligent, enthousiastic and open conversations.
This forum is the only place in the world I have for intelligent interaction (apart from rare occasions in the woods).
The large majority in this area and my IQ100 family can't even read English. I represent a reverse brain drain because I moved back to Fryslân.
Sorry guys, I needed to get this of my chest and realise that it's off topic here.
Thank you for 'listening'.
And many thanks for all the helpful posts with information, tips and motivations!
edit: changed 3th paragraph above to include my great encounters with some intelligent people where I live