For a start, try hosting something in your own home. A raspberry or an older PC or laptop should be enough.
My first projects were a print server (so I can print via wifi) and a file server. Try to find something that is useful for you.
Only start hosting on the internet when you’ve learned the basics and have more experience.
No USB power plug operates at 5 V when providing 65 Watts. That would be 13 Amps. Both power plugs most likey use 15 or 20 volts internally. 19 volts is not allowed over USB.
Edit: Here is a short summary of the USB-PD spec from Wikipedia