It's simple. You have Toncoin and you are ready to freeze them for a while to multiply. To do this, you need to select one of the validators and transfer your tokens to its management.
This functionality will be available later...
Minimum requirements – 8 CPU, 64GB RAM, 1TB SSD, dedicated IP, 1GB/s internet speed.
Running a node on weaker hardware is dangerous in that you could be fined for a stake.
The minimum stake is 600 thousand Toncoin.
Software is used to launch the node – MyTonCtrl. After installation, you can connect a graphical interface to conveniently manage the process.
Check out the docs.