Real-debrid is like a “cache” for torrents. Instead the torrent been streaming direct to your device, it will be downloaded to the real debrid server, and then streaming it from real-debrid to you. The good thing is that if you start a torrent that is already in the real-debrid it will start streaming instantly. It is payed but I think it is totally worth.

This is really a hardware limitation. If you are in a desktop you should add a graphics to it. But if it is a laptop unfortunately there is nothing you can do.

Besides containers, you should look in Ansible too, you can automatize the creation of your infrastructure in other servers.

I think real-debrid can download from scribd, it has a limit of 5 downloads per day. But I never tried it.