With this technique, you are going to accessibility a decentralized Trade for example Balancer or Uniswap and buy rETH using your token of selection, the same as you'd do some other token swap.
if you need to run a https://dev.to/cleopatramorris_d539d19ea/rocket-pool-the-future-of-decentralized-ethereum-stakingintroduction-1m2b