There are two problems with our ability to do this. One is that we can't afford many young buys right now. We have to get some losses off the books first.
The other is our ability to attract players. Nobody wants to become the next Grealish grinding in the Championship, which is why we've had to loot and pillage a relegated club. It's hard to get young players to commit their futures to a club that finished 16th and can't spend. They (rightly) fear they could get stuck down there.
So we have to stopgap at least some positions. If we look like we're on solid footing again, and have a transfer kitty, we can start working on getting younger.