I using discourse as my main website, and I would like to get payment options for my users while signup, for my services
Have you looked at the Patreon plugin?
I didn’t understant, how Patreon plugin works, do you know any other easy plugin?
For Patreon to work, You need an account on patreon.com and the Patreon Integration Plugin installed to Your discourse instance, All the necessary configuration is documented on the plugin page.
I’m afraid there aren’t many payment/subscriptions plugins available to discourse.
Patreon is among the easiest to configure. You might also check out https://memberful.com/help/third-party-integrations/discourse (also described here: Discourse Memberful integration).
The Discourse Patreon Integration describes how to install a plugin. If that is beyond your capabilities or interest, then you could get me to do it: Discourse Plugin Install – Literate Computing, LLC