I’m looking to volunteer in a kennel as a beginner but I’m struggling to find a shelter.

I’m M19 living in London (specifically NW2). I liked animals since I was 5 but never got to experience with them. Lately I’ve been thinking that I should volunteer at a kennel but I can’t seem to find a shelter that would accept me. I applied at Battersea, they rejected me due to many applicants. With Mayhew, I tried applying but it’s been 4 weeks and no response, I called them last week and said to look for other shelters which I’m guessing that means they also rejected. On RSCPA it’s all filled up and those that are vacant are outside London and I almost never leave London and I don’t have a driver’s license. On All Dogs Matter I’m required to travel to Essex. I can’t seem to find a place where I can foster dogs. I tried BorrowMyDoggy but there’s like 10% success rate and even then I don’t get to see them again, they say they’re busy or that I’m better off volunteering at a shelter.

It seems that I’m all out of options. I don’t wanna adopt yet because I’m still a beginner and I wanna see how it’s gonna be like. I’d appreciate any suggestions.