Yes, you can encrypt the VPN traffic through a VPN. It's the most secure and convenient way because a VPN can be stable and fast. I would avoid using proxies because they're not stable and you don't know who manages them. However, you can buy VPN subscriptions from various websites. I do not recommend using the free ones because no torrent is supported and because of their speed. A private VPN with active subscription will always give you top speed and maximum connectivity.
For example, there is CyberGhost that you can use with your torrent. These services provide their own desktop client to connect, then you can start the torrent client to download.