@Rubens I understand how you feel, but hopefully if members of all levels start to participate then you would feel ok?
I recently joined an in-person playing group (after being added to the mailing list by someone I know like 5-6 years back) and the friend I brought and I are much more advanced than most. But everyone is nice and appreciative of everyone else and there's a little social time afterward, and no one feels bad at all. We were so warmly welcomed that I wondered why I was scared to show up for so long.
I probably won't join the recitals here because of two reasons: I'm eternally working on chamber music now, and I don't have the time/energy to listen to everyone's playing and respond. I'm aware that I'm online all day and active on the forum, but I'm trying not to be! But I think you should participate in the recitals and people will really appreciate getting to listen to your playing and to have your feedback.
Also want to comment that Sam made it pretty clear that the upcoming recital is happening on PW and I'm not sure if that's the long term plan? I wouldn't blame him if he doesn't want to run parallel recitals in two places.