It seems the search field searches for more than just the community name, e.g. when I search for Test it finds a lot of names but it also finds the community “Test”. It is probably easier to bookmark or subscribe a community when you post to it repeatedly (or remember the URL to type it)

i think the main support is to parcipate, Lemmy is still quite small and there is no enough content

That should work with Perl or Python quite easily using the Lemmy API

either there has to be a minimum time for account creation of be able to post (which can be circumvented) or you can post one article and then have to wait for upvotes (which can be circumvented)