Nice! So, how long does the wood need to age and how do you age it?
That question requires an answer much longer than you might have anticipated. :08:
The answer can vary widely because different types of trees will age or dry at different rates and the size of the tree must be taken into account as well, here's the general idea:
The wood can be turned when the tree has just been felled, you would usually 'rough' turn the wood leaving the wall thickness about twice as thick as you plan for the end result. After this rough turning you would store the wood for some months, taking care to not let the wood dry too fast. There are lots of ways to slow the drying process, one way is to pack the piece in shavings and sawdust.
The answer above only touches the tip of the iceberg when it comes to ways to store and cure (dry) wood.
For wood (logs) that you're not going to use right away you would just stack them and leave then to dry, which could take several months to several years. For this type of storage some turners like to coat the ends (end grain) of their log with some kind of sealer so the drying will be slowed over time.