Wow, I know it has been a while now, but I hope the THA went well!! More and more surgeons are embracing the "minimally invasive" hip replacement, which, not to be too sardonic, doesn't quite exist yet but you know what I mean. In this technique they tend to move around muscle and other structures as through, as it was hopefully communicated to you in the pre-op "briefing."
Aaanyway, it's not so much for you in this exact case, as I'm sure you've progressed beyond the need for an assistive device (at least for this reason :p), but if you happen to return here or for anyone else paying attention, there are plenty of resources for post-op weight bearing tips and tricks. As a veteran of the PT field I have always found aftercare resources to be left wanting - patients would come to us saying "uhhh, can I walk now, with what device, and how?"
Anyway anyway, my favorite resource so far as it regards the proper selection and use of assistive devices, i.e. walking with a walker, crutches, or cane, etc, is https://www.straightgaitsupply.com/walker-guide/ (this URL points to their walker guide). I hope it helps you or anyone else who finds this as it has helped me.