You're going to need to send the bitcoin manually from CBP to your HW wallet's address, and again, that includes fees. So to save a bit of money and if the CBP withdrawal fees are too much, probably wait til you have a good amount of bitcoin on your CBP account before withdrawing.
Someone can correct me if I'm wrong here (because I have never used Coinbase myself), but I was under the impression that bitcoin withdrawals from Coinbase Pro (and maybe Coinbase?) were free. Certainly that seems to be the case according to their support pages here:
https://support.pro.coinbase.com/customer/en/portal/articles/2945310-what-are-the-fees-on-coinbase-pro-Oh whoops. I'm most probably in the wrong here. I just completely assumed that every single exchange has a withdrawal fee(and that Coinbase doesn't support the country I'm currently in). If it's the case that Coinbase Pro really does have no withdrawal fee, then better! I'm going to make another assumption that there's most likely going to be a minimum withdrawal amount though.