Looking for Permaculture Volunteering Projects

Hi, I am looking for any projects taking on volunteers, specifically in Portugal, Spain, France or Italy. I’d like to volunteer on a project with multiple other volunteers rather than it just be me and a family, for instance. I was hoping to go to a well-known farm in Portugal but they are fully booked for volunteers.

I’m on limited funds as I will be leaving my (boring) office job in September, so I can’t really afford to pay to stay.

Also, if anyone has any resources on learning about permaculture… I find it a little overwhelming as I know there is a lot to learn, and sometimes I feel like I’m too old to learn new things or like my brain is saturated with old knowledge. I have plenty of growing experience but shifting it into a permaculture framework is a little daunting.

Thanks in advance.