If you don’t have someone to forward your mail to, you can get a “virtual mailbox”. This gives you a physical address and is pretty cheap. Many of them will send you a photo of the outside and you can have them scan it, forward, shred it, etc.
There are fees for each operation, but it’s a good way to see what your mail is while away. I use iPostal1 and it’s been pretty good so far.
I wouldn’t trust a random person online to receive my mail put it on their computers and the internet and dispose of the physical…why is this a good idea?
Post offices will forward mail and have for decades