"Overloading" on extracurriculars

Okay so I am currently a junior, and have a question about extracurriculars. Basically, I have found so many opportunities and summer programs recently for me to do, but sadly, it is now that I found all of them, as a junior who has one summer left. For example, I just found out that there is MUN online, which I immediately signed up for earlier today. I have also found many programs for the summer that I would love to do. My point is, will I be affected by doing all of these programs and ECs now, being that it’ll look like as if I am doing everything now so that I can buff up my app? It is definitely not the case, though. My counselor does not really tell me about opportunities for things, so I have to find them myself. I also can’t pay $4k for a pre college program, so those opportunities have come, but I have avoided them and have tried to find programs that would not be an issue financially. Would that show initiative? I’m just kinda bummed that all these awesome programs are showing up to me now, when I have such little time in school left.
There are also some things I am trying to set up now to do, for example Teen Court. I currently can transport myself there, so I am trying to make it happen, but transportation issues didn’t allow me to do this before. Would all of this look bad?