It begins with choosing the correct categories to post in, you asked where only resources to download are offered, that whole category is for downloading resources, not for support requests if they do not belong to a resource already offered there, then you can ask in that existing topic.
But you found at least where you can find tons of possible candidates fulfilling your request.
Now to your request: This is a more or less standard pressure sensitive brush, if you search through Krita’s stock brushes you will find some that are very near to your example.
If you want to try out some more elaborate brushes, you can begin sifting through these bundles:
And these are only a few good starting points. If you want to pay for a much hailed bundle consisting out of three brushes, and have a little time till its creator reacts, which sometimes can last a few days, but anyone got the brushes so far, you may want to check this out:
Hello @tempaccountsorry, and welcome to the forum!