This is literally a Zero Day thing. We have pretty much NO idea how this install will go. TPM, Legacy, UEFI, Secure Boot, specific hardware, etc, etc, etc. You who are trying this install are as much experts on this as anyone else in here. "How do i...?" doesn't really count yet. Patience, and...
And you may need to actually purchase a TPM hardware module.
TPM is typically a laptop security feature for corps that's not found on consumer motherboards. If you're wondering about Win11 support there's no need to be concerned as Win11 will work just fine without a TPM module.
Looking at the motherboard manual (quickly, I admit), I didn't see a TPM header on the motherboard layout, nor a setting in the BIOS to enable PTT. I would translate that to mean that you MAY need to modernize your rig.
Before taking that leap, I suggest waiting to see what (if any) changes MS makes to system requirements prior to actually releasing Win 11. There is no hurry here.