Customized Sidebars

Hello,

I’m new to WordPress so I’m sorry if I’m asking this in the wrong area. I want to have my sidebar content different on different pages. So for /mypage/subpage i want a contact form but on mypage/subpage2 I don’t. Is there a plugin that I can use for this or a way to code it myself? I barely know php but i’m learning.
I saw a few when I did a search, but I’m not sure what to use now.
Please help with any advise 🙂
Thank you 🙂