Set multiple PATH Variables in MacOS Big Sur (zsh)

Question

I want to add multiple Path Variables:

• Dart & Pub (Doesn't work)
• sdkman (works)
• homebrew and its installations (Doesn't work)
• Deno (Doesn't work)
• Cargo & Rust (works)
• Npm & NodeJS (Doesn't work, but worked without setting a path until i added cargo)

And that's my current .zshrc file:

export PATH="$PATH":"$HOME/.pub-cache/bin"
source "$HOME/.sdkman/bin/sdkman-init.sh"
export PATH="/opt/homebrew/bin"
export PATH="/Users/kloetzchengrafik/.deno/bin:$PATH"
PATH=/bin:/usr/bin:/usr/local/bin:${PATH}
export PATH

# Setting PATH for Cargo
PATH="/Users/kloetzchengrafik/.cargo/bin"
export PATH