This is a draft answer (incomplete).

To get set up on Signet ie sync the Signet chain and claim some Signet Bitcoin, follow [these instructions][1]. (You can run a Signet node in parallel with your mainnet node, ie same hardware)

You now have funds at a non-P2TR (i.e. SegWit v0) Signet address. Now you need to generate a P2TR address to send funds to so you have funds at a P2TR address (so you can spend from it).

TBC




  [1]: https://bitcoin.stackexchange.com/questions/98553/how-do-i-get-set-up-on-signet